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Finding the Fourth Proportional to 815.88, 1,125.86 and 484.18

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Solution

The fourth proportional to 815.88, 1,125.86 and 484.18 is: 668.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.88 : 1,125.86 = 484.18 : x
  2. Step 2: Convert to fraction form
    815.88/1,125.86 = 484.18/x
  3. Step 3: Cross multiply
    815.88x = 1,125.86 × 484.18
  4. Step 4: Simplify right side
    815.88x = 545,118.89
  5. Step 5: Solve for x
    x = 545,118.89/815.88
  6. Step 6: Final answer
    x = 668.14

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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.