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Finding the Fourth Proportional to 1,248.38, 1,871.51 and 836.25

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Solution

The fourth proportional to 1,248.38, 1,871.51 and 836.25 is: 1,253.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.38 : 1,871.51 = 836.25 : x
  2. Step 2: Convert to fraction form
    1,248.38/1,871.51 = 836.25/x
  3. Step 3: Cross multiply
    1,248.38x = 1,871.51 × 836.25
  4. Step 4: Simplify right side
    1,248.38x = 1,565,046.06
  5. Step 5: Solve for x
    x = 1,565,046.06/1,248.38
  6. Step 6: Final answer
    x = 1,253.67

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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.