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Finding the Fourth Proportional to 489.16, 732.56 and 283.28

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Solution

The fourth proportional to 489.16, 732.56 and 283.28 is: 424.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    489.16 : 732.56 = 283.28 : x
  2. Step 2: Convert to fraction form
    489.16/732.56 = 283.28/x
  3. Step 3: Cross multiply
    489.16x = 732.56 × 283.28
  4. Step 4: Simplify right side
    489.16x = 207,519.60
  5. Step 5: Solve for x
    x = 207,519.60/489.16
  6. Step 6: Final answer
    x = 424.24

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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.