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Finding the Fourth Proportional to 891.74, 1,230.39 and 537.57

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Solution

The fourth proportional to 891.74, 1,230.39 and 537.57 is: 741.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.74 : 1,230.39 = 537.57 : x
  2. Step 2: Convert to fraction form
    891.74/1,230.39 = 537.57/x
  3. Step 3: Cross multiply
    891.74x = 1,230.39 × 537.57
  4. Step 4: Simplify right side
    891.74x = 661,420.75
  5. Step 5: Solve for x
    x = 661,420.75/891.74
  6. Step 6: Final answer
    x = 741.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.