Home / 3,140.55-4,710.86-949.30

Finding the Fourth Proportional to 3,140.55, 4,710.86 and 949.30

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Solution

The fourth proportional to 3,140.55, 4,710.86 and 949.30 is: 1,423.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.55 : 4,710.86 = 949.30 : x
  2. Step 2: Convert to fraction form
    3,140.55/4,710.86 = 949.30/x
  3. Step 3: Cross multiply
    3,140.55x = 4,710.86 × 949.30
  4. Step 4: Simplify right side
    3,140.55x = 4,472,019.40
  5. Step 5: Solve for x
    x = 4,472,019.40/3,140.55
  6. Step 6: Final answer
    x = 1,423.96

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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.