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Finding the Fourth Proportional to 718,940.80, 992,141.76 and 396,650.88

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Solution

The fourth proportional to 718,940.80, 992,141.76 and 396,650.88 is: 547,380.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,940.80 : 992,141.76 = 396,650.88 : x
  2. Step 2: Convert to fraction form
    718,940.80/992,141.76 = 396,650.88/x
  3. Step 3: Cross multiply
    718,940.80x = 992,141.76 × 396,650.88
  4. Step 4: Simplify right side
    718,940.80x = 393,533,902,188.75
  5. Step 5: Solve for x
    x = 393,533,902,188.75/718,940.80
  6. Step 6: Final answer
    x = 547,380.12

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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.