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Finding the Fourth Proportional to 718,170.91, 991,082.52 and 395,892.56

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Solution

The fourth proportional to 718,170.91, 991,082.52 and 395,892.56 is: 546,335.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,170.91 : 991,082.52 = 395,892.56 : x
  2. Step 2: Convert to fraction form
    718,170.91/991,082.52 = 395,892.56/x
  3. Step 3: Cross multiply
    718,170.91x = 991,082.52 × 395,892.56
  4. Step 4: Simplify right side
    718,170.91x = 392,362,198,491.76
  5. Step 5: Solve for x
    x = 392,362,198,491.76/718,170.91
  6. Step 6: Final answer
    x = 546,335.41

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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.