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Finding the Fourth Proportional to 1,167.49, 1,751.43 and 387.76

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Solution

The fourth proportional to 1,167.49, 1,751.43 and 387.76 is: 581.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.49 : 1,751.43 = 387.76 : x
  2. Step 2: Convert to fraction form
    1,167.49/1,751.43 = 387.76/x
  3. Step 3: Cross multiply
    1,167.49x = 1,751.43 × 387.76
  4. Step 4: Simplify right side
    1,167.49x = 679,134.50
  5. Step 5: Solve for x
    x = 679,134.50/1,167.49
  6. Step 6: Final answer
    x = 581.70

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Double scale
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1.5x scale

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.