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Finding the Fourth Proportional to 717, 988.62 and 483.72

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Solution

The fourth proportional to 717, 988.62 and 483.72 is: 666.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    717 : 988.62 = 483.72 : x
  2. Step 2: Convert to fraction form
    717/988.62 = 483.72/x
  3. Step 3: Cross multiply
    717x = 988.62 × 483.72
  4. Step 4: Simplify right side
    717x = 478,215.27
  5. Step 5: Solve for x
    x = 478,215.27/717
  6. Step 6: Final answer
    x = 666.97

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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.