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Finding the Fourth Proportional to 1,250.88, 1,875.72 and 385.12

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Solution

The fourth proportional to 1,250.88, 1,875.72 and 385.12 is: 577.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,250.88 : 1,875.72 = 385.12 : x
  2. Step 2: Convert to fraction form
    1,250.88/1,875.72 = 385.12/x
  3. Step 3: Cross multiply
    1,250.88x = 1,875.72 × 385.12
  4. Step 4: Simplify right side
    1,250.88x = 722,377.29
  5. Step 5: Solve for x
    x = 722,377.29/1,250.88
  6. Step 6: Final answer
    x = 577.50

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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.