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Finding the Fourth Proportional to 493.79, 740.60 and 147.12

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Solution

The fourth proportional to 493.79, 740.60 and 147.12 is: 220.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    493.79 : 740.60 = 147.12 : x
  2. Step 2: Convert to fraction form
    493.79/740.60 = 147.12/x
  3. Step 3: Cross multiply
    493.79x = 740.60 × 147.12
  4. Step 4: Simplify right side
    493.79x = 108,957.07
  5. Step 5: Solve for x
    x = 108,957.07/493.79
  6. Step 6: Final answer
    x = 220.65

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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.