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Finding the Fourth Proportional to 706.95, 1,061.13 and 578.48

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Solution

The fourth proportional to 706.95, 1,061.13 and 578.48 is: 868.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.95 : 1,061.13 = 578.48 : x
  2. Step 2: Convert to fraction form
    706.95/1,061.13 = 578.48/x
  3. Step 3: Cross multiply
    706.95x = 1,061.13 × 578.48
  4. Step 4: Simplify right side
    706.95x = 613,837.18
  5. Step 5: Solve for x
    x = 613,837.18/706.95
  6. Step 6: Final answer
    x = 868.29

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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.