Home / 642,170.38-886,195.10-355,708.92

Finding the Fourth Proportional to 642,170.38, 886,195.10 and 355,708.92

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Solution

The fourth proportional to 642,170.38, 886,195.10 and 355,708.92 is: 490,878.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,170.38 : 886,195.10 = 355,708.92 : x
  2. Step 2: Convert to fraction form
    642,170.38/886,195.10 = 355,708.92/x
  3. Step 3: Cross multiply
    642,170.38x = 886,195.10 × 355,708.92
  4. Step 4: Simplify right side
    642,170.38x = 315,227,501,930.29
  5. Step 5: Solve for x
    x = 315,227,501,930.29/642,170.38
  6. Step 6: Final answer
    x = 490,878.30

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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.