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Finding the Fourth Proportional to 611,805.70, 917,708.55 and 442,969.30

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Solution

The fourth proportional to 611,805.70, 917,708.55 and 442,969.30 is: 664,453.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,805.70 : 917,708.55 = 442,969.30 : x
  2. Step 2: Convert to fraction form
    611,805.70/917,708.55 = 442,969.30/x
  3. Step 3: Cross multiply
    611,805.70x = 917,708.55 × 442,969.30
  4. Step 4: Simplify right side
    611,805.70x = 406,516,713,997.52
  5. Step 5: Solve for x
    x = 406,516,713,997.52/611,805.70
  6. Step 6: Final answer
    x = 664,453.95

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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.