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Finding the Fourth Proportional to 1,353.75, 1,868.18 and 732.75

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Solution

The fourth proportional to 1,353.75, 1,868.18 and 732.75 is: 1,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.75 : 1,868.18 = 732.75 : x
  2. Step 2: Convert to fraction form
    1,353.75/1,868.18 = 732.75/x
  3. Step 3: Cross multiply
    1,353.75x = 1,868.18 × 732.75
  4. Step 4: Simplify right side
    1,353.75x = 1,368,905.23
  5. Step 5: Solve for x
    x = 1,368,905.23/1,353.75
  6. Step 6: Final answer
    x = 1,011.20

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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.