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Finding the Fourth Proportional to 3,139.71, 4,332.72 and 1,723.39

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Solution

The fourth proportional to 3,139.71, 4,332.72 and 1,723.39 is: 2,378.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.71 : 4,332.72 = 1,723.39 : x
  2. Step 2: Convert to fraction form
    3,139.71/4,332.72 = 1,723.39/x
  3. Step 3: Cross multiply
    3,139.71x = 4,332.72 × 1,723.39
  4. Step 4: Simplify right side
    3,139.71x = 7,466,966.32
  5. Step 5: Solve for x
    x = 7,466,966.32/3,139.71
  6. Step 6: Final answer
    x = 2,378.23

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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.