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Finding the Fourth Proportional to 1,322.30, 1,824.75 and 755.12

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Solution

The fourth proportional to 1,322.30, 1,824.75 and 755.12 is: 1,042.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.30 : 1,824.75 = 755.12 : x
  2. Step 2: Convert to fraction form
    1,322.30/1,824.75 = 755.12/x
  3. Step 3: Cross multiply
    1,322.30x = 1,824.75 × 755.12
  4. Step 4: Simplify right side
    1,322.30x = 1,377,909.78
  5. Step 5: Solve for x
    x = 1,377,909.78/1,322.30
  6. Step 6: Final answer
    x = 1,042.06

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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.