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Finding the Fourth Proportional to 547,395.79, 755,761.64 and 489,935.60

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Solution

The fourth proportional to 547,395.79, 755,761.64 and 489,935.60 is: 676,429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,395.79 : 755,761.64 = 489,935.60 : x
  2. Step 2: Convert to fraction form
    547,395.79/755,761.64 = 489,935.60/x
  3. Step 3: Cross multiply
    547,395.79x = 755,761.64 × 489,935.60
  4. Step 4: Simplify right side
    547,395.79x = 370,274,531,990.11
  5. Step 5: Solve for x
    x = 370,274,531,990.11/547,395.79
  6. Step 6: Final answer
    x = 676,429.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.