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Finding the Fourth Proportional to 815.12, 1,125.22 and 535.34

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Solution

The fourth proportional to 815.12, 1,125.22 and 535.34 is: 739.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.12 : 1,125.22 = 535.34 : x
  2. Step 2: Convert to fraction form
    815.12/1,125.22 = 535.34/x
  3. Step 3: Cross multiply
    815.12x = 1,125.22 × 535.34
  4. Step 4: Simplify right side
    815.12x = 602,375.27
  5. Step 5: Solve for x
    x = 602,375.27/815.12
  6. Step 6: Final answer
    x = 739.00

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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.