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Finding the Fourth Proportional to 1,167.60, 1,751.30 and 387.52

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Solution

The fourth proportional to 1,167.60, 1,751.30 and 387.52 is: 581.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,167.60 : 1,751.30 = 387.52 : x
  2. Step 2: Convert to fraction form
    1,167.60/1,751.30 = 387.52/x
  3. Step 3: Cross multiply
    1,167.60x = 1,751.30 × 387.52
  4. Step 4: Simplify right side
    1,167.60x = 678,663.78
  5. Step 5: Solve for x
    x = 678,663.78/1,167.60
  6. Step 6: Final answer
    x = 581.25

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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.