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Finding the Fourth Proportional to 2,173.11, 3,259.91 and 787.10

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Solution

The fourth proportional to 2,173.11, 3,259.91 and 787.10 is: 1,180.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.11 : 3,259.91 = 787.10 : x
  2. Step 2: Convert to fraction form
    2,173.11/3,259.91 = 787.10/x
  3. Step 3: Cross multiply
    2,173.11x = 3,259.91 × 787.10
  4. Step 4: Simplify right side
    2,173.11x = 2,565,860.83
  5. Step 5: Solve for x
    x = 2,565,860.83/2,173.11
  6. Step 6: Final answer
    x = 1,180.73

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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.