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Finding the Fourth Proportional to 3,240.79, 4,472.00 and 1,805.04

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Solution

The fourth proportional to 3,240.79, 4,472.00 and 1,805.04 is: 2,490.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.79 : 4,472.00 = 1,805.04 : x
  2. Step 2: Convert to fraction form
    3,240.79/4,472.00 = 1,805.04/x
  3. Step 3: Cross multiply
    3,240.79x = 4,472.00 × 1,805.04
  4. Step 4: Simplify right side
    3,240.79x = 8,072,154.57
  5. Step 5: Solve for x
    x = 8,072,154.57/3,240.79
  6. Step 6: Final answer
    x = 2,490.80

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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.