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Finding the Fourth Proportional to 1,528.72, 2,291.96 and 488.13

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Solution

The fourth proportional to 1,528.72, 2,291.96 and 488.13 is: 731.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,528.72 : 2,291.96 = 488.13 : x
  2. Step 2: Convert to fraction form
    1,528.72/2,291.96 = 488.13/x
  3. Step 3: Cross multiply
    1,528.72x = 2,291.96 × 488.13
  4. Step 4: Simplify right side
    1,528.72x = 1,118,767.06
  5. Step 5: Solve for x
    x = 1,118,767.06/1,528.72
  6. Step 6: Final answer
    x = 731.83

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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.