Home / 3,130.20-4,695.30-1,280.10

Finding the Fourth Proportional to 3,130.20, 4,695.30 and 1,280.10

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Solution

The fourth proportional to 3,130.20, 4,695.30 and 1,280.10 is: 1,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.20 : 4,695.30 = 1,280.10 : x
  2. Step 2: Convert to fraction form
    3,130.20/4,695.30 = 1,280.10/x
  3. Step 3: Cross multiply
    3,130.20x = 4,695.30 × 1,280.10
  4. Step 4: Simplify right side
    3,130.20x = 6,010,453.53
  5. Step 5: Solve for x
    x = 6,010,453.53/3,130.20
  6. Step 6: Final answer
    x = 1,920.15

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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.