Home / 3,139.80-4,710.15-948.70

Finding the Fourth Proportional to 3,139.80, 4,710.15 and 948.70

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Solution

The fourth proportional to 3,139.80, 4,710.15 and 948.70 is: 1,423.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.80 : 4,710.15 = 948.70 : x
  2. Step 2: Convert to fraction form
    3,139.80/4,710.15 = 948.70/x
  3. Step 3: Cross multiply
    3,139.80x = 4,710.15 × 948.70
  4. Step 4: Simplify right side
    3,139.80x = 4,468,519.31
  5. Step 5: Solve for x
    x = 4,468,519.31/3,139.80
  6. Step 6: Final answer
    x = 1,423.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.