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Finding the Fourth Proportional to 717.34, 988.11 and 507.15

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Solution

The fourth proportional to 717.34, 988.11 and 507.15 is: 698.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.34 : 988.11 = 507.15 : x
  2. Step 2: Convert to fraction form
    717.34/988.11 = 507.15/x
  3. Step 3: Cross multiply
    717.34x = 988.11 × 507.15
  4. Step 4: Simplify right side
    717.34x = 501,115.05
  5. Step 5: Solve for x
    x = 501,115.05/717.34
  6. Step 6: Final answer
    x = 698.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.