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Finding the Fourth Proportional to 1,757.76, 2,425.62 and 971.76

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Solution

The fourth proportional to 1,757.76, 2,425.62 and 971.76 is: 1,340.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.76 : 2,425.62 = 971.76 : x
  2. Step 2: Convert to fraction form
    1,757.76/2,425.62 = 971.76/x
  3. Step 3: Cross multiply
    1,757.76x = 2,425.62 × 971.76
  4. Step 4: Simplify right side
    1,757.76x = 2,357,120.49
  5. Step 5: Solve for x
    x = 2,357,120.49/1,757.76
  6. Step 6: Final answer
    x = 1,340.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.