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Finding the Fourth Proportional to 747.53, 1,120.64 and 401.05

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Solution

The fourth proportional to 747.53, 1,120.64 and 401.05 is: 601.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.53 : 1,120.64 = 401.05 : x
  2. Step 2: Convert to fraction form
    747.53/1,120.64 = 401.05/x
  3. Step 3: Cross multiply
    747.53x = 1,120.64 × 401.05
  4. Step 4: Simplify right side
    747.53x = 449,432.07
  5. Step 5: Solve for x
    x = 449,432.07/747.53
  6. Step 6: Final answer
    x = 601.22

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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.