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Finding the Fourth Proportional to 1,013.64, 1,520.04 and 493.20

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Solution

The fourth proportional to 1,013.64, 1,520.04 and 493.20 is: 739.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.64 : 1,520.04 = 493.20 : x
  2. Step 2: Convert to fraction form
    1,013.64/1,520.04 = 493.20/x
  3. Step 3: Cross multiply
    1,013.64x = 1,520.04 × 493.20
  4. Step 4: Simplify right side
    1,013.64x = 749,683.73
  5. Step 5: Solve for x
    x = 749,683.73/1,013.64
  6. Step 6: Final answer
    x = 739.60

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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.