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Finding the Fourth Proportional to 658,438.86, 987,716.61 and 185,128.32

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Solution

The fourth proportional to 658,438.86, 987,716.61 and 185,128.32 is: 277,708.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,438.86 : 987,716.61 = 185,128.32 : x
  2. Step 2: Convert to fraction form
    658,438.86/987,716.61 = 185,128.32/x
  3. Step 3: Cross multiply
    658,438.86x = 987,716.61 × 185,128.32
  4. Step 4: Simplify right side
    658,438.86x = 182,854,316,645.40
  5. Step 5: Solve for x
    x = 182,854,316,645.40/658,438.86
  6. Step 6: Final answer
    x = 277,708.88

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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.