Home / 3,545.40-4,890.78-2,147.88

Finding the Fourth Proportional to 3,545.40, 4,890.78 and 2,147.88

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Solution

The fourth proportional to 3,545.40, 4,890.78 and 2,147.88 is: 2,962.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,545.40 : 4,890.78 = 2,147.88 : x
  2. Step 2: Convert to fraction form
    3,545.40/4,890.78 = 2,147.88/x
  3. Step 3: Cross multiply
    3,545.40x = 4,890.78 × 2,147.88
  4. Step 4: Simplify right side
    3,545.40x = 10,504,808.55
  5. Step 5: Solve for x
    x = 10,504,808.55/3,545.40
  6. Step 6: Final answer
    x = 2,962.94

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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.