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Finding the Fourth Proportional to 741.52, 1,112.55 and 394.89

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Solution

The fourth proportional to 741.52, 1,112.55 and 394.89 is: 592.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.52 : 1,112.55 = 394.89 : x
  2. Step 2: Convert to fraction form
    741.52/1,112.55 = 394.89/x
  3. Step 3: Cross multiply
    741.52x = 1,112.55 × 394.89
  4. Step 4: Simplify right side
    741.52x = 439,334.87
  5. Step 5: Solve for x
    x = 439,334.87/741.52
  6. Step 6: Final answer
    x = 592.48

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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.