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Finding the Fourth Proportional to 1,380.87, 2,069.28 and 732.06

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Solution

The fourth proportional to 1,380.87, 2,069.28 and 732.06 is: 1,097.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380.87 : 2,069.28 = 732.06 : x
  2. Step 2: Convert to fraction form
    1,380.87/2,069.28 = 732.06/x
  3. Step 3: Cross multiply
    1,380.87x = 2,069.28 × 732.06
  4. Step 4: Simplify right side
    1,380.87x = 1,514,837.12
  5. Step 5: Solve for x
    x = 1,514,837.12/1,380.87
  6. Step 6: Final answer
    x = 1,097.02

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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.