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Finding the Fourth Proportional to 1,061.12, 1,580.74 and 1,028.88

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Solution

The fourth proportional to 1,061.12, 1,580.74 and 1,028.88 is: 1,532.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,061.12 : 1,580.74 = 1,028.88 : x
  2. Step 2: Convert to fraction form
    1,061.12/1,580.74 = 1,028.88/x
  3. Step 3: Cross multiply
    1,061.12x = 1,580.74 × 1,028.88
  4. Step 4: Simplify right side
    1,061.12x = 1,626,394.99
  5. Step 5: Solve for x
    x = 1,626,394.99/1,061.12
  6. Step 6: Final answer
    x = 1,532.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.