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Finding the Fourth Proportional to 753.75, 1,130.63 and 240.75

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Solution

The fourth proportional to 753.75, 1,130.63 and 240.75 is: 361.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.75 : 1,130.63 = 240.75 : x
  2. Step 2: Convert to fraction form
    753.75/1,130.63 = 240.75/x
  3. Step 3: Cross multiply
    753.75x = 1,130.63 × 240.75
  4. Step 4: Simplify right side
    753.75x = 272,197.97
  5. Step 5: Solve for x
    x = 272,197.97/753.75
  6. Step 6: Final answer
    x = 361.13

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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.