Home / 639,072,877.20-958,609,315.80-509,932,714.20

Finding the Fourth Proportional to 639,072,877.20, 958,609,315.80 and 509,932,714.20

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Solution

The fourth proportional to 639,072,877.20, 958,609,315.80 and 509,932,714.20 is: 764,899,071.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,072,877.20 : 958,609,315.80 = 509,932,714.20 : x
  2. Step 2: Convert to fraction form
    639,072,877.20/958,609,315.80 = 509,932,714.20/x
  3. Step 3: Cross multiply
    639,072,877.20x = 958,609,315.80 × 509,932,714.20
  4. Step 4: Simplify right side
    639,072,877.20x = 488,826,250,263,298,880
  5. Step 5: Solve for x
    x = 488,826,250,263,298,880/639,072,877.20
  6. Step 6: Final answer
    x = 764,899,071.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.