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Finding the Fourth Proportional to 615,456.70, 849,780.18 and 397,794.17

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Solution

The fourth proportional to 615,456.70, 849,780.18 and 397,794.17 is: 549,246.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,456.70 : 849,780.18 = 397,794.17 : x
  2. Step 2: Convert to fraction form
    615,456.70/849,780.18 = 397,794.17/x
  3. Step 3: Cross multiply
    615,456.70x = 849,780.18 × 397,794.17
  4. Step 4: Simplify right side
    615,456.70x = 338,037,601,385.55
  5. Step 5: Solve for x
    x = 338,037,601,385.55/615,456.70
  6. Step 6: Final answer
    x = 549,246.76

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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.