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Finding the Fourth Proportional to 1,325.53, 1,989.05 and 493.17

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Solution

The fourth proportional to 1,325.53, 1,989.05 and 493.17 is: 740.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.53 : 1,989.05 = 493.17 : x
  2. Step 2: Convert to fraction form
    1,325.53/1,989.05 = 493.17/x
  3. Step 3: Cross multiply
    1,325.53x = 1,989.05 × 493.17
  4. Step 4: Simplify right side
    1,325.53x = 980,943.83
  5. Step 5: Solve for x
    x = 980,943.83/1,325.53
  6. Step 6: Final answer
    x = 740.04

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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.