Home / 1,147.50-1,721.25-378.06

Finding the Fourth Proportional to 1,147.50, 1,721.25 and 378.06

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Solution

The fourth proportional to 1,147.50, 1,721.25 and 378.06 is: 567.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.50 : 1,721.25 = 378.06 : x
  2. Step 2: Convert to fraction form
    1,147.50/1,721.25 = 378.06/x
  3. Step 3: Cross multiply
    1,147.50x = 1,721.25 × 378.06
  4. Step 4: Simplify right side
    1,147.50x = 650,735.78
  5. Step 5: Solve for x
    x = 650,735.78/1,147.50
  6. Step 6: Final answer
    x = 567.09

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.