Home / 3,140.48-4,710.89-949.15

Finding the Fourth Proportional to 3,140.48, 4,710.89 and 949.15

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Solution

The fourth proportional to 3,140.48, 4,710.89 and 949.15 is: 1,423.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.48 : 4,710.89 = 949.15 : x
  2. Step 2: Convert to fraction form
    3,140.48/4,710.89 = 949.15/x
  3. Step 3: Cross multiply
    3,140.48x = 4,710.89 × 949.15
  4. Step 4: Simplify right side
    3,140.48x = 4,471,341.24
  5. Step 5: Solve for x
    x = 4,471,341.24/3,140.48
  6. Step 6: Final answer
    x = 1,423.78

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1.5x scale

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.