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Finding the Fourth Proportional to 1,249.40, 1,873.56 and 383.52

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Solution

The fourth proportional to 1,249.40, 1,873.56 and 383.52 is: 575.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,249.40 : 1,873.56 = 383.52 : x
  2. Step 2: Convert to fraction form
    1,249.40/1,873.56 = 383.52/x
  3. Step 3: Cross multiply
    1,249.40x = 1,873.56 × 383.52
  4. Step 4: Simplify right side
    1,249.40x = 718,547.73
  5. Step 5: Solve for x
    x = 718,547.73/1,249.40
  6. Step 6: Final answer
    x = 575.11

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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.