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Finding the Fourth Proportional to 1,548.75, 2,138.03 and 885.50

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Solution

The fourth proportional to 1,548.75, 2,138.03 and 885.50 is: 1,222.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,548.75 : 2,138.03 = 885.50 : x
  2. Step 2: Convert to fraction form
    1,548.75/2,138.03 = 885.50/x
  3. Step 3: Cross multiply
    1,548.75x = 2,138.03 × 885.50
  4. Step 4: Simplify right side
    1,548.75x = 1,893,221.79
  5. Step 5: Solve for x
    x = 1,893,221.79/1,548.75
  6. Step 6: Final answer
    x = 1,222.42

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.