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Finding the Fourth Proportional to 1,447.78, 2,170.04 and 717.88

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Solution

The fourth proportional to 1,447.78, 2,170.04 and 717.88 is: 1,076.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.78 : 2,170.04 = 717.88 : x
  2. Step 2: Convert to fraction form
    1,447.78/2,170.04 = 717.88/x
  3. Step 3: Cross multiply
    1,447.78x = 2,170.04 × 717.88
  4. Step 4: Simplify right side
    1,447.78x = 1,557,828.32
  5. Step 5: Solve for x
    x = 1,557,828.32/1,447.78
  6. Step 6: Final answer
    x = 1,076.01

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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.