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Finding the Fourth Proportional to 1,167.92, 1,751.58 and 387.98

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Solution

The fourth proportional to 1,167.92, 1,751.58 and 387.98 is: 581.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.92 : 1,751.58 = 387.98 : x
  2. Step 2: Convert to fraction form
    1,167.92/1,751.58 = 387.98/x
  3. Step 3: Cross multiply
    1,167.92x = 1,751.58 × 387.98
  4. Step 4: Simplify right side
    1,167.92x = 679,578.01
  5. Step 5: Solve for x
    x = 679,578.01/1,167.92
  6. Step 6: Final answer
    x = 581.87

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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.