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Finding the Fourth Proportional to 715.52, 1,071.24 and 670.16

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Solution

The fourth proportional to 715.52, 1,071.24 and 670.16 is: 1,003.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.52 : 1,071.24 = 670.16 : x
  2. Step 2: Convert to fraction form
    715.52/1,071.24 = 670.16/x
  3. Step 3: Cross multiply
    715.52x = 1,071.24 × 670.16
  4. Step 4: Simplify right side
    715.52x = 717,902.20
  5. Step 5: Solve for x
    x = 717,902.20/715.52
  6. Step 6: Final answer
    x = 1,003.33

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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.