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Finding the Fourth Proportional to 1,681.28, 2,518.74 and 951.38

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Solution

The fourth proportional to 1,681.28, 2,518.74 and 951.38 is: 1,425.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.28 : 2,518.74 = 951.38 : x
  2. Step 2: Convert to fraction form
    1,681.28/2,518.74 = 951.38/x
  3. Step 3: Cross multiply
    1,681.28x = 2,518.74 × 951.38
  4. Step 4: Simplify right side
    1,681.28x = 2,396,278.86
  5. Step 5: Solve for x
    x = 2,396,278.86/1,681.28
  6. Step 6: Final answer
    x = 1,425.27

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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.