Home / 784,437.60-1,175,101.20-428,815.20

Finding the Fourth Proportional to 784,437.60, 1,175,101.20 and 428,815.20

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Solution

The fourth proportional to 784,437.60, 1,175,101.20 and 428,815.20 is: 642,372.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    784,437.60 : 1,175,101.20 = 428,815.20 : x
  2. Step 2: Convert to fraction form
    784,437.60/1,175,101.20 = 428,815.20/x
  3. Step 3: Cross multiply
    784,437.60x = 1,175,101.20 × 428,815.20
  4. Step 4: Simplify right side
    784,437.60x = 503,901,256,098.24
  5. Step 5: Solve for x
    x = 503,901,256,098.24/784,437.60
  6. Step 6: Final answer
    x = 642,372.65

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Double scale
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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.