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Finding the Fourth Proportional to 2,877.80, 4,306.98 and 2,391.80

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Solution

The fourth proportional to 2,877.80, 4,306.98 and 2,391.80 is: 3,579.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,877.80 : 4,306.98 = 2,391.80 : x
  2. Step 2: Convert to fraction form
    2,877.80/4,306.98 = 2,391.80/x
  3. Step 3: Cross multiply
    2,877.80x = 4,306.98 × 2,391.80
  4. Step 4: Simplify right side
    2,877.80x = 10,301,434.76
  5. Step 5: Solve for x
    x = 10,301,434.76/2,877.80
  6. Step 6: Final answer
    x = 3,579.62

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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.