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Finding the Fourth Proportional to 1,528.85, 2,290.39 and 877.61

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Solution

The fourth proportional to 1,528.85, 2,290.39 and 877.61 is: 1,314.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.85 : 2,290.39 = 877.61 : x
  2. Step 2: Convert to fraction form
    1,528.85/2,290.39 = 877.61/x
  3. Step 3: Cross multiply
    1,528.85x = 2,290.39 × 877.61
  4. Step 4: Simplify right side
    1,528.85x = 2,010,069.17
  5. Step 5: Solve for x
    x = 2,010,069.17/1,528.85
  6. Step 6: Final answer
    x = 1,314.76

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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.