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Finding the Fourth Proportional to 615,296.90, 921,390.15 and 403,789.70

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Solution

The fourth proportional to 615,296.90, 921,390.15 and 403,789.70 is: 604,663.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,296.90 : 921,390.15 = 403,789.70 : x
  2. Step 2: Convert to fraction form
    615,296.90/921,390.15 = 403,789.70/x
  3. Step 3: Cross multiply
    615,296.90x = 921,390.15 × 403,789.70
  4. Step 4: Simplify right side
    615,296.90x = 372,047,852,251.46
  5. Step 5: Solve for x
    x = 372,047,852,251.46/615,296.90
  6. Step 6: Final answer
    x = 604,663.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.