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Finding the Fourth Proportional to 718,346.46, 991,324.53 and 396,068.12

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Solution

The fourth proportional to 718,346.46, 991,324.53 and 396,068.12 is: 546,577.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,346.46 : 991,324.53 = 396,068.12 : x
  2. Step 2: Convert to fraction form
    718,346.46/991,324.53 = 396,068.12/x
  3. Step 3: Cross multiply
    718,346.46x = 991,324.53 × 396,068.12
  4. Step 4: Simplify right side
    718,346.46x = 392,632,037,950.36
  5. Step 5: Solve for x
    x = 392,632,037,950.36/718,346.46
  6. Step 6: Final answer
    x = 546,577.54

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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.