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Finding the Fourth Proportional to 658,120.80, 988,347.60 and 508,724.40

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Solution

The fourth proportional to 658,120.80, 988,347.60 and 508,724.40 is: 763,988.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,120.80 : 988,347.60 = 508,724.40 : x
  2. Step 2: Convert to fraction form
    658,120.80/988,347.60 = 508,724.40/x
  3. Step 3: Cross multiply
    658,120.80x = 988,347.60 × 508,724.40
  4. Step 4: Simplify right side
    658,120.80x = 502,796,539,801.44
  5. Step 5: Solve for x
    x = 502,796,539,801.44/658,120.80
  6. Step 6: Final answer
    x = 763,988.22

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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.