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Finding the Fourth Proportional to 1,781.74, 2,671.53 and 806.50

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Solution

The fourth proportional to 1,781.74, 2,671.53 and 806.50 is: 1,209.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.74 : 2,671.53 = 806.50 : x
  2. Step 2: Convert to fraction form
    1,781.74/2,671.53 = 806.50/x
  3. Step 3: Cross multiply
    1,781.74x = 2,671.53 × 806.50
  4. Step 4: Simplify right side
    1,781.74x = 2,154,588.95
  5. Step 5: Solve for x
    x = 2,154,588.95/1,781.74
  6. Step 6: Final answer
    x = 1,209.26

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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.