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Finding the Fourth Proportional to 1,131.66, 1,560.60 and 738

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Solution

The fourth proportional to 1,131.66, 1,560.60 and 738 is: 1,017.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.66 : 1,560.60 = 738 : x
  2. Step 2: Convert to fraction form
    1,131.66/1,560.60 = 738/x
  3. Step 3: Cross multiply
    1,131.66x = 1,560.60 × 738
  4. Step 4: Simplify right side
    1,131.66x = 1,151,722.80
  5. Step 5: Solve for x
    x = 1,151,722.80/1,131.66
  6. Step 6: Final answer
    x = 1,017.73

Related Problems

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.