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Finding the Fourth Proportional to 1,488.38, 2,232.78 and 514.28

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Solution

The fourth proportional to 1,488.38, 2,232.78 and 514.28 is: 771.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.38 : 2,232.78 = 514.28 : x
  2. Step 2: Convert to fraction form
    1,488.38/2,232.78 = 514.28/x
  3. Step 3: Cross multiply
    1,488.38x = 2,232.78 × 514.28
  4. Step 4: Simplify right side
    1,488.38x = 1,148,274.10
  5. Step 5: Solve for x
    x = 1,148,274.10/1,488.38
  6. Step 6: Final answer
    x = 771.49

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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.