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Finding the Fourth Proportional to 1,173.72, 1,761.05 and 654.07

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Solution

The fourth proportional to 1,173.72, 1,761.05 and 654.07 is: 981.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.72 : 1,761.05 = 654.07 : x
  2. Step 2: Convert to fraction form
    1,173.72/1,761.05 = 654.07/x
  3. Step 3: Cross multiply
    1,173.72x = 1,761.05 × 654.07
  4. Step 4: Simplify right side
    1,173.72x = 1,151,849.97
  5. Step 5: Solve for x
    x = 1,151,849.97/1,173.72
  6. Step 6: Final answer
    x = 981.37

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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.