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Finding the Fourth Proportional to 1,325.79, 1,987.38 and 741.07

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Solution

The fourth proportional to 1,325.79, 1,987.38 and 741.07 is: 1,110.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.79 : 1,987.38 = 741.07 : x
  2. Step 2: Convert to fraction form
    1,325.79/1,987.38 = 741.07/x
  3. Step 3: Cross multiply
    1,325.79x = 1,987.38 × 741.07
  4. Step 4: Simplify right side
    1,325.79x = 1,472,787.70
  5. Step 5: Solve for x
    x = 1,472,787.70/1,325.79
  6. Step 6: Final answer
    x = 1,110.88

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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.