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Finding the Fourth Proportional to 280.32, 420.18 and 124.02

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Solution

The fourth proportional to 280.32, 420.18 and 124.02 is: 185.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.32 : 420.18 = 124.02 : x
  2. Step 2: Convert to fraction form
    280.32/420.18 = 124.02/x
  3. Step 3: Cross multiply
    280.32x = 420.18 × 124.02
  4. Step 4: Simplify right side
    280.32x = 52,110.72
  5. Step 5: Solve for x
    x = 52,110.72/280.32
  6. Step 6: Final answer
    x = 185.90

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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.