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Finding the Fourth Proportional to 1,248.89, 1,873.27 and 383.21

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Solution

The fourth proportional to 1,248.89, 1,873.27 and 383.21 is: 574.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.89 : 1,873.27 = 383.21 : x
  2. Step 2: Convert to fraction form
    1,248.89/1,873.27 = 383.21/x
  3. Step 3: Cross multiply
    1,248.89x = 1,873.27 × 383.21
  4. Step 4: Simplify right side
    1,248.89x = 717,845.47
  5. Step 5: Solve for x
    x = 717,845.47/1,248.89
  6. Step 6: Final answer
    x = 574.79

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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.