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Finding the Fourth Proportional to 3,955.70, 5,458.70 and 2,275.96

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Solution

The fourth proportional to 3,955.70, 5,458.70 and 2,275.96 is: 3,140.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,955.70 : 5,458.70 = 2,275.96 : x
  2. Step 2: Convert to fraction form
    3,955.70/5,458.70 = 2,275.96/x
  3. Step 3: Cross multiply
    3,955.70x = 5,458.70 × 2,275.96
  4. Step 4: Simplify right side
    3,955.70x = 12,423,782.85
  5. Step 5: Solve for x
    x = 12,423,782.85/3,955.70
  6. Step 6: Final answer
    x = 3,140.73

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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.