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Finding the Fourth Proportional to 611,793.70, 917,690.55 and 442,957.30

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Solution

The fourth proportional to 611,793.70, 917,690.55 and 442,957.30 is: 664,435.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,793.70 : 917,690.55 = 442,957.30 : x
  2. Step 2: Convert to fraction form
    611,793.70/917,690.55 = 442,957.30/x
  3. Step 3: Cross multiply
    611,793.70x = 917,690.55 × 442,957.30
  4. Step 4: Simplify right side
    611,793.70x = 406,497,728,263.52
  5. Step 5: Solve for x
    x = 406,497,728,263.52/611,793.70
  6. Step 6: Final answer
    x = 664,435.95

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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.