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Finding the Fourth Proportional to 706.52, 1,065.87 and 687.08

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Solution

The fourth proportional to 706.52, 1,065.87 and 687.08 is: 1,036.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.52 : 1,065.87 = 687.08 : x
  2. Step 2: Convert to fraction form
    706.52/1,065.87 = 687.08/x
  3. Step 3: Cross multiply
    706.52x = 1,065.87 × 687.08
  4. Step 4: Simplify right side
    706.52x = 732,337.96
  5. Step 5: Solve for x
    x = 732,337.96/706.52
  6. Step 6: Final answer
    x = 1,036.54

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.