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Finding the Fourth Proportional to 1,018.76, 1,528.06 and 498.92

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Solution

The fourth proportional to 1,018.76, 1,528.06 and 498.92 is: 748.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.76 : 1,528.06 = 498.92 : x
  2. Step 2: Convert to fraction form
    1,018.76/1,528.06 = 498.92/x
  3. Step 3: Cross multiply
    1,018.76x = 1,528.06 × 498.92
  4. Step 4: Simplify right side
    1,018.76x = 762,379.70
  5. Step 5: Solve for x
    x = 762,379.70/1,018.76
  6. Step 6: Final answer
    x = 748.34

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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.