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Finding the Fourth Proportional to 639,187.84, 882,053.43 and 352,704.20

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Solution

The fourth proportional to 639,187.84, 882,053.43 and 352,704.20 is: 486,717.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,187.84 : 882,053.43 = 352,704.20 : x
  2. Step 2: Convert to fraction form
    639,187.84/882,053.43 = 352,704.20/x
  3. Step 3: Cross multiply
    639,187.84x = 882,053.43 × 352,704.20
  4. Step 4: Simplify right side
    639,187.84x = 311,103,949,385.41
  5. Step 5: Solve for x
    x = 311,103,949,385.41/639,187.84
  6. Step 6: Final answer
    x = 486,717.57

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.