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Finding the Fourth Proportional to 658,177.61, 987,630.72 and 321,221.05

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Solution

The fourth proportional to 658,177.61, 987,630.72 and 321,221.05 is: 482,009.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,177.61 : 987,630.72 = 321,221.05 : x
  2. Step 2: Convert to fraction form
    658,177.61/987,630.72 = 321,221.05/x
  3. Step 3: Cross multiply
    658,177.61x = 987,630.72 × 321,221.05
  4. Step 4: Simplify right side
    658,177.61x = 317,247,776,890.66
  5. Step 5: Solve for x
    x = 317,247,776,890.66/658,177.61
  6. Step 6: Final answer
    x = 482,009.37

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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.