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Finding the Fourth Proportional to 1,757.55, 2,425.39 and 971.61

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Solution

The fourth proportional to 1,757.55, 2,425.39 and 971.61 is: 1,340.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,757.55 : 2,425.39 = 971.61 : x
  2. Step 2: Convert to fraction form
    1,757.55/2,425.39 = 971.61/x
  3. Step 3: Cross multiply
    1,757.55x = 2,425.39 × 971.61
  4. Step 4: Simplify right side
    1,757.55x = 2,356,533.18
  5. Step 5: Solve for x
    x = 2,356,533.18/1,757.55
  6. Step 6: Final answer
    x = 1,340.81

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1.5x scale

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.