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Finding the Fourth Proportional to 517.50, 713.82 and 307.53

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Solution

The fourth proportional to 517.50, 713.82 and 307.53 is: 424.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.50 : 713.82 = 307.53 : x
  2. Step 2: Convert to fraction form
    517.50/713.82 = 307.53/x
  3. Step 3: Cross multiply
    517.50x = 713.82 × 307.53
  4. Step 4: Simplify right side
    517.50x = 219,521.06
  5. Step 5: Solve for x
    x = 219,521.06/517.50
  6. Step 6: Final answer
    x = 424.20

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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.