Home / 3,281.80-4,925.90-1,640.20

Finding the Fourth Proportional to 3,281.80, 4,925.90 and 1,640.20

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Solution

The fourth proportional to 3,281.80, 4,925.90 and 1,640.20 is: 2,461.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,281.80 : 4,925.90 = 1,640.20 : x
  2. Step 2: Convert to fraction form
    3,281.80/4,925.90 = 1,640.20/x
  3. Step 3: Cross multiply
    3,281.80x = 4,925.90 × 1,640.20
  4. Step 4: Simplify right side
    3,281.80x = 8,079,461.18
  5. Step 5: Solve for x
    x = 8,079,461.18/3,281.80
  6. Step 6: Final answer
    x = 2,461.90

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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.