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Finding the Fourth Proportional to 802.91, 1,204.49 and 413.15

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Solution

The fourth proportional to 802.91, 1,204.49 and 413.15 is: 619.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    802.91 : 1,204.49 = 413.15 : x
  2. Step 2: Convert to fraction form
    802.91/1,204.49 = 413.15/x
  3. Step 3: Cross multiply
    802.91x = 1,204.49 × 413.15
  4. Step 4: Simplify right side
    802.91x = 497,630.05
  5. Step 5: Solve for x
    x = 497,630.05/802.91
  6. Step 6: Final answer
    x = 619.78

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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.