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Finding the Fourth Proportional to 1,641.66, 2,463.21 and 1,275.90

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Solution

The fourth proportional to 1,641.66, 2,463.21 and 1,275.90 is: 1,914.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,641.66 : 2,463.21 = 1,275.90 : x
  2. Step 2: Convert to fraction form
    1,641.66/2,463.21 = 1,275.90/x
  3. Step 3: Cross multiply
    1,641.66x = 2,463.21 × 1,275.90
  4. Step 4: Simplify right side
    1,641.66x = 3,142,809.64
  5. Step 5: Solve for x
    x = 3,142,809.64/1,641.66
  6. Step 6: Final answer
    x = 1,914.41

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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.