Home / 3,129.51-4,694.17-1,280.10

Finding the Fourth Proportional to 3,129.51, 4,694.17 and 1,280.10

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Solution

The fourth proportional to 3,129.51, 4,694.17 and 1,280.10 is: 1,920.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.51 : 4,694.17 = 1,280.10 : x
  2. Step 2: Convert to fraction form
    3,129.51/4,694.17 = 1,280.10/x
  3. Step 3: Cross multiply
    3,129.51x = 4,694.17 × 1,280.10
  4. Step 4: Simplify right side
    3,129.51x = 6,009,007.02
  5. Step 5: Solve for x
    x = 6,009,007.02/3,129.51
  6. Step 6: Final answer
    x = 1,920.11

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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.