Home / 812,672.38-1,121,496.12-490,320.16

Finding the Fourth Proportional to 812,672.38, 1,121,496.12 and 490,320.16

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Solution

The fourth proportional to 812,672.38, 1,121,496.12 and 490,320.16 is: 676,646.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,672.38 : 1,121,496.12 = 490,320.16 : x
  2. Step 2: Convert to fraction form
    812,672.38/1,121,496.12 = 490,320.16/x
  3. Step 3: Cross multiply
    812,672.38x = 1,121,496.12 × 490,320.16
  4. Step 4: Simplify right side
    812,672.38x = 549,892,156,997.78
  5. Step 5: Solve for x
    x = 549,892,156,997.78/812,672.38
  6. Step 6: Final answer
    x = 676,646.79

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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.