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Finding the Fourth Proportional to 517.68, 714.40 and 284.80

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Solution

The fourth proportional to 517.68, 714.40 and 284.80 is: 393.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.68 : 714.40 = 284.80 : x
  2. Step 2: Convert to fraction form
    517.68/714.40 = 284.80/x
  3. Step 3: Cross multiply
    517.68x = 714.40 × 284.80
  4. Step 4: Simplify right side
    517.68x = 203,459.70
  5. Step 5: Solve for x
    x = 203,459.70/517.68
  6. Step 6: Final answer
    x = 393.03

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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.