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Finding the Fourth Proportional to 368.40, 552.96 and 280.92

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Solution

The fourth proportional to 368.40, 552.96 and 280.92 is: 421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.40 : 552.96 = 280.92 : x
  2. Step 2: Convert to fraction form
    368.40/552.96 = 280.92/x
  3. Step 3: Cross multiply
    368.40x = 552.96 × 280.92
  4. Step 4: Simplify right side
    368.40x = 155,337.52
  5. Step 5: Solve for x
    x = 155,337.52/368.40
  6. Step 6: Final answer
    x = 421.65

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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.