Home / 3,140.60-4,710.20-1,386.12

Finding the Fourth Proportional to 3,140.60, 4,710.20 and 1,386.12

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Solution

The fourth proportional to 3,140.60, 4,710.20 and 1,386.12 is: 2,078.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.60 : 4,710.20 = 1,386.12 : x
  2. Step 2: Convert to fraction form
    3,140.60/4,710.20 = 1,386.12/x
  3. Step 3: Cross multiply
    3,140.60x = 4,710.20 × 1,386.12
  4. Step 4: Simplify right side
    3,140.60x = 6,528,902.42
  5. Step 5: Solve for x
    x = 6,528,902.42/3,140.60
  6. Step 6: Final answer
    x = 2,078.87

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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.