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Finding the Fourth Proportional to 720,084.93, 993,702.90 and 397,792

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Solution

The fourth proportional to 720,084.93, 993,702.90 and 397,792 is: 548,945.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,084.93 : 993,702.90 = 397,792 : x
  2. Step 2: Convert to fraction form
    720,084.93/993,702.90 = 397,792/x
  3. Step 3: Cross multiply
    720,084.93x = 993,702.90 × 397,792
  4. Step 4: Simplify right side
    720,084.93x = 395,287,063,996.80
  5. Step 5: Solve for x
    x = 395,287,063,996.80/720,084.93
  6. Step 6: Final answer
    x = 548,945.06

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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.