Home / 2,108.80-2,909.68-1,323.20

Finding the Fourth Proportional to 2,108.80, 2,909.68 and 1,323.20

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Solution

The fourth proportional to 2,108.80, 2,909.68 and 1,323.20 is: 1,825.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108.80 : 2,909.68 = 1,323.20 : x
  2. Step 2: Convert to fraction form
    2,108.80/2,909.68 = 1,323.20/x
  3. Step 3: Cross multiply
    2,108.80x = 2,909.68 × 1,323.20
  4. Step 4: Simplify right side
    2,108.80x = 3,850,088.58
  5. Step 5: Solve for x
    x = 3,850,088.58/2,108.80
  6. Step 6: Final answer
    x = 1,825.72

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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.