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Finding the Fourth Proportional to 1,171.72, 1,757.74 and 402.04

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Solution

The fourth proportional to 1,171.72, 1,757.74 and 402.04 is: 603.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,171.72 : 1,757.74 = 402.04 : x
  2. Step 2: Convert to fraction form
    1,171.72/1,757.74 = 402.04/x
  3. Step 3: Cross multiply
    1,171.72x = 1,757.74 × 402.04
  4. Step 4: Simplify right side
    1,171.72x = 706,681.79
  5. Step 5: Solve for x
    x = 706,681.79/1,171.72
  6. Step 6: Final answer
    x = 603.11

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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.