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Finding the Fourth Proportional to 498.78, 747.81 and 174.06

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Solution

The fourth proportional to 498.78, 747.81 and 174.06 is: 260.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    498.78 : 747.81 = 174.06 : x
  2. Step 2: Convert to fraction form
    498.78/747.81 = 174.06/x
  3. Step 3: Cross multiply
    498.78x = 747.81 × 174.06
  4. Step 4: Simplify right side
    498.78x = 130,163.81
  5. Step 5: Solve for x
    x = 130,163.81/498.78
  6. Step 6: Final answer
    x = 260.96

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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.