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Finding the Fourth Proportional to 901.15, 1,243.55 and 547.11

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Solution

The fourth proportional to 901.15, 1,243.55 and 547.11 is: 754.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.15 : 1,243.55 = 547.11 : x
  2. Step 2: Convert to fraction form
    901.15/1,243.55 = 547.11/x
  3. Step 3: Cross multiply
    901.15x = 1,243.55 × 547.11
  4. Step 4: Simplify right side
    901.15x = 680,360.01
  5. Step 5: Solve for x
    x = 680,360.01/901.15
  6. Step 6: Final answer
    x = 754.99

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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.