Home / 1,147.50-1,721.43-378.18

Finding the Fourth Proportional to 1,147.50, 1,721.43 and 378.18

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Solution

The fourth proportional to 1,147.50, 1,721.43 and 378.18 is: 567.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.50 : 1,721.43 = 378.18 : x
  2. Step 2: Convert to fraction form
    1,147.50/1,721.43 = 378.18/x
  3. Step 3: Cross multiply
    1,147.50x = 1,721.43 × 378.18
  4. Step 4: Simplify right side
    1,147.50x = 651,010.40
  5. Step 5: Solve for x
    x = 651,010.40/1,147.50
  6. Step 6: Final answer
    x = 567.33

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Half scale
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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.