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Finding the Fourth Proportional to 706.32, 1,057.26 and 489.24

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Solution

The fourth proportional to 706.32, 1,057.26 and 489.24 is: 732.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.32 : 1,057.26 = 489.24 : x
  2. Step 2: Convert to fraction form
    706.32/1,057.26 = 489.24/x
  3. Step 3: Cross multiply
    706.32x = 1,057.26 × 489.24
  4. Step 4: Simplify right side
    706.32x = 517,253.88
  5. Step 5: Solve for x
    x = 517,253.88/706.32
  6. Step 6: Final answer
    x = 732.32

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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.