Home / 2,139.88-3,204.96-1,045.12

Finding the Fourth Proportional to 2,139.88, 3,204.96 and 1,045.12

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Solution

The fourth proportional to 2,139.88, 3,204.96 and 1,045.12 is: 1,565.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.88 : 3,204.96 = 1,045.12 : x
  2. Step 2: Convert to fraction form
    2,139.88/3,204.96 = 1,045.12/x
  3. Step 3: Cross multiply
    2,139.88x = 3,204.96 × 1,045.12
  4. Step 4: Simplify right side
    2,139.88x = 3,349,567.80
  5. Step 5: Solve for x
    x = 3,349,567.80/2,139.88
  6. Step 6: Final answer
    x = 1,565.31

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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.