Home / 2,385.80-3,292.20-1,391.17

Finding the Fourth Proportional to 2,385.80, 3,292.20 and 1,391.17

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Solution

The fourth proportional to 2,385.80, 3,292.20 and 1,391.17 is: 1,919.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.80 : 3,292.20 = 1,391.17 : x
  2. Step 2: Convert to fraction form
    2,385.80/3,292.20 = 1,391.17/x
  3. Step 3: Cross multiply
    2,385.80x = 3,292.20 × 1,391.17
  4. Step 4: Simplify right side
    2,385.80x = 4,580,009.87
  5. Step 5: Solve for x
    x = 4,580,009.87/2,385.80
  6. Step 6: Final answer
    x = 1,919.70

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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.