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Finding the Fourth Proportional to 1,554.32, 2,144.92 and 855.70

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Solution

The fourth proportional to 1,554.32, 2,144.92 and 855.70 is: 1,180.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,554.32 : 2,144.92 = 855.70 : x
  2. Step 2: Convert to fraction form
    1,554.32/2,144.92 = 855.70/x
  3. Step 3: Cross multiply
    1,554.32x = 2,144.92 × 855.70
  4. Step 4: Simplify right side
    1,554.32x = 1,835,408.04
  5. Step 5: Solve for x
    x = 1,835,408.04/1,554.32
  6. Step 6: Final answer
    x = 1,180.84

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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.