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Finding the Fourth Proportional to 1,757.76, 2,425.85 and 971.83

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Solution

The fourth proportional to 1,757.76, 2,425.85 and 971.83 is: 1,341.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.76 : 2,425.85 = 971.83 : x
  2. Step 2: Convert to fraction form
    1,757.76/2,425.85 = 971.83/x
  3. Step 3: Cross multiply
    1,757.76x = 2,425.85 × 971.83
  4. Step 4: Simplify right side
    1,757.76x = 2,357,513.81
  5. Step 5: Solve for x
    x = 2,357,513.81/1,757.76
  6. Step 6: Final answer
    x = 1,341.20

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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.