Home / 1,920.10-2,649.78-1,134.20

Finding the Fourth Proportional to 1,920.10, 2,649.78 and 1,134.20

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Solution

The fourth proportional to 1,920.10, 2,649.78 and 1,134.20 is: 1,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,920.10 : 2,649.78 = 1,134.20 : x
  2. Step 2: Convert to fraction form
    1,920.10/2,649.78 = 1,134.20/x
  3. Step 3: Cross multiply
    1,920.10x = 2,649.78 × 1,134.20
  4. Step 4: Simplify right side
    1,920.10x = 3,005,380.48
  5. Step 5: Solve for x
    x = 3,005,380.48/1,920.10
  6. Step 6: Final answer
    x = 1,565.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.