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Finding the Fourth Proportional to 3,870.91, 5,805.13 and 1,273.23

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Solution

The fourth proportional to 3,870.91, 5,805.13 and 1,273.23 is: 1,909.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.91 : 5,805.13 = 1,273.23 : x
  2. Step 2: Convert to fraction form
    3,870.91/5,805.13 = 1,273.23/x
  3. Step 3: Cross multiply
    3,870.91x = 5,805.13 × 1,273.23
  4. Step 4: Simplify right side
    3,870.91x = 7,391,259.30
  5. Step 5: Solve for x
    x = 7,391,259.30/3,870.91
  6. Step 6: Final answer
    x = 1,909.44

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Double scale
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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.