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Finding the Fourth Proportional to 489,658.73, 734,403.45 and 129,831.89

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Solution

The fourth proportional to 489,658.73, 734,403.45 and 129,831.89 is: 194,725.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,658.73 : 734,403.45 = 129,831.89 : x
  2. Step 2: Convert to fraction form
    489,658.73/734,403.45 = 129,831.89/x
  3. Step 3: Cross multiply
    489,658.73x = 734,403.45 × 129,831.89
  4. Step 4: Simplify right side
    489,658.73x = 95,348,987,936.02
  5. Step 5: Solve for x
    x = 95,348,987,936.02/489,658.73
  6. Step 6: Final answer
    x = 194,725.39

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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.