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Finding the Fourth Proportional to 489.64, 732.90 and 307.24

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Solution

The fourth proportional to 489.64, 732.90 and 307.24 is: 459.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.64 : 732.90 = 307.24 : x
  2. Step 2: Convert to fraction form
    489.64/732.90 = 307.24/x
  3. Step 3: Cross multiply
    489.64x = 732.90 × 307.24
  4. Step 4: Simplify right side
    489.64x = 225,176.20
  5. Step 5: Solve for x
    x = 225,176.20/489.64
  6. Step 6: Final answer
    x = 459.88

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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.