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Finding the Fourth Proportional to 1,528.53, 2,290.91 and 870.97

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Solution

The fourth proportional to 1,528.53, 2,290.91 and 870.97 is: 1,305.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.53 : 2,290.91 = 870.97 : x
  2. Step 2: Convert to fraction form
    1,528.53/2,290.91 = 870.97/x
  3. Step 3: Cross multiply
    1,528.53x = 2,290.91 × 870.97
  4. Step 4: Simplify right side
    1,528.53x = 1,995,313.88
  5. Step 5: Solve for x
    x = 1,995,313.88/1,528.53
  6. Step 6: Final answer
    x = 1,305.38

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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.