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Finding the Fourth Proportional to 2,407.65, 3,319.47 and 1,974.88

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Solution

The fourth proportional to 2,407.65, 3,319.47 and 1,974.88 is: 2,722.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,407.65 : 3,319.47 = 1,974.88 : x
  2. Step 2: Convert to fraction form
    2,407.65/3,319.47 = 1,974.88/x
  3. Step 3: Cross multiply
    2,407.65x = 3,319.47 × 1,974.88
  4. Step 4: Simplify right side
    2,407.65x = 6,555,546.61
  5. Step 5: Solve for x
    x = 6,555,546.61/2,407.65
  6. Step 6: Final answer
    x = 2,722.80

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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.