Home / 2,385.45-3,290.90-1,640.39

Finding the Fourth Proportional to 2,385.45, 3,290.90 and 1,640.39

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Solution

The fourth proportional to 2,385.45, 3,290.90 and 1,640.39 is: 2,263.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,385.45 : 3,290.90 = 1,640.39 : x
  2. Step 2: Convert to fraction form
    2,385.45/3,290.90 = 1,640.39/x
  3. Step 3: Cross multiply
    2,385.45x = 3,290.90 × 1,640.39
  4. Step 4: Simplify right side
    2,385.45x = 5,398,334.79
  5. Step 5: Solve for x
    x = 5,398,334.79/2,385.45
  6. Step 6: Final answer
    x = 2,263.03

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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.