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Finding the Fourth Proportional to 498.66, 747.88 and 190.40

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Solution

The fourth proportional to 498.66, 747.88 and 190.40 is: 285.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.66 : 747.88 = 190.40 : x
  2. Step 2: Convert to fraction form
    498.66/747.88 = 190.40/x
  3. Step 3: Cross multiply
    498.66x = 747.88 × 190.40
  4. Step 4: Simplify right side
    498.66x = 142,397.41
  5. Step 5: Solve for x
    x = 142,397.41/498.66
  6. Step 6: Final answer
    x = 285.56

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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.