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Finding the Fourth Proportional to 1,470.87, 2,028.78 and 1,028.88

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Solution

The fourth proportional to 1,470.87, 2,028.78 and 1,028.88 is: 1,419.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,470.87 : 2,028.78 = 1,028.88 : x
  2. Step 2: Convert to fraction form
    1,470.87/2,028.78 = 1,028.88/x
  3. Step 3: Cross multiply
    1,470.87x = 2,028.78 × 1,028.88
  4. Step 4: Simplify right side
    1,470.87x = 2,087,371.17
  5. Step 5: Solve for x
    x = 2,087,371.17/1,470.87
  6. Step 6: Final answer
    x = 1,419.14

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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.