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Finding the Fourth Proportional to 741.32, 1,112.65 and 394.95

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Solution

The fourth proportional to 741.32, 1,112.65 and 394.95 is: 592.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    741.32 : 1,112.65 = 394.95 : x
  2. Step 2: Convert to fraction form
    741.32/1,112.65 = 394.95/x
  3. Step 3: Cross multiply
    741.32x = 1,112.65 × 394.95
  4. Step 4: Simplify right side
    741.32x = 439,435.55
  5. Step 5: Solve for x
    x = 439,435.55/741.32
  6. Step 6: Final answer
    x = 592.77

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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.