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Finding the Fourth Proportional to 493.40, 740.56 and 354.72

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Solution

The fourth proportional to 493.40, 740.56 and 354.72 is: 532.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.40 : 740.56 = 354.72 : x
  2. Step 2: Convert to fraction form
    493.40/740.56 = 354.72/x
  3. Step 3: Cross multiply
    493.40x = 740.56 × 354.72
  4. Step 4: Simplify right side
    493.40x = 262,691.44
  5. Step 5: Solve for x
    x = 262,691.44/493.40
  6. Step 6: Final answer
    x = 532.41

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.