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Finding the Fourth Proportional to 1,360.38, 1,873.08 and 1,138.85

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Solution

The fourth proportional to 1,360.38, 1,873.08 and 1,138.85 is: 1,568.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.38 : 1,873.08 = 1,138.85 : x
  2. Step 2: Convert to fraction form
    1,360.38/1,873.08 = 1,138.85/x
  3. Step 3: Cross multiply
    1,360.38x = 1,873.08 × 1,138.85
  4. Step 4: Simplify right side
    1,360.38x = 2,133,157.16
  5. Step 5: Solve for x
    x = 2,133,157.16/1,360.38
  6. Step 6: Final answer
    x = 1,568.06

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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.