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Finding the Fourth Proportional to 1,544.70, 2,131.16 and 881.08

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Solution

The fourth proportional to 1,544.70, 2,131.16 and 881.08 is: 1,215.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,544.70 : 2,131.16 = 881.08 : x
  2. Step 2: Convert to fraction form
    1,544.70/2,131.16 = 881.08/x
  3. Step 3: Cross multiply
    1,544.70x = 2,131.16 × 881.08
  4. Step 4: Simplify right side
    1,544.70x = 1,877,711.80
  5. Step 5: Solve for x
    x = 1,877,711.80/1,544.70
  6. Step 6: Final answer
    x = 1,215.58

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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.