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Finding the Fourth Proportional to 413.72, 621.12 and 283.34

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Solution

The fourth proportional to 413.72, 621.12 and 283.34 is: 425.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    413.72 : 621.12 = 283.34 : x
  2. Step 2: Convert to fraction form
    413.72/621.12 = 283.34/x
  3. Step 3: Cross multiply
    413.72x = 621.12 × 283.34
  4. Step 4: Simplify right side
    413.72x = 175,988.14
  5. Step 5: Solve for x
    x = 175,988.14/413.72
  6. Step 6: Final answer
    x = 425.38

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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.