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Finding the Fourth Proportional to 517.94, 714.76 and 285.08

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Solution

The fourth proportional to 517.94, 714.76 and 285.08 is: 393.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.94 : 714.76 = 285.08 : x
  2. Step 2: Convert to fraction form
    517.94/714.76 = 285.08/x
  3. Step 3: Cross multiply
    517.94x = 714.76 × 285.08
  4. Step 4: Simplify right side
    517.94x = 203,763.78
  5. Step 5: Solve for x
    x = 203,763.78/517.94
  6. Step 6: Final answer
    x = 393.41

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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.