Home / 3,139.40-4,710.04-948.20

Finding the Fourth Proportional to 3,139.40, 4,710.04 and 948.20

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Solution

The fourth proportional to 3,139.40, 4,710.04 and 948.20 is: 1,422.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.40 : 4,710.04 = 948.20 : x
  2. Step 2: Convert to fraction form
    3,139.40/4,710.04 = 948.20/x
  3. Step 3: Cross multiply
    3,139.40x = 4,710.04 × 948.20
  4. Step 4: Simplify right side
    3,139.40x = 4,466,059.93
  5. Step 5: Solve for x
    x = 4,466,059.93/3,139.40
  6. Step 6: Final answer
    x = 1,422.58

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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.