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Finding the Fourth Proportional to 818.10, 1,127.82 and 552.08

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Solution

The fourth proportional to 818.10, 1,127.82 and 552.08 is: 761.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.10 : 1,127.82 = 552.08 : x
  2. Step 2: Convert to fraction form
    818.10/1,127.82 = 552.08/x
  3. Step 3: Cross multiply
    818.10x = 1,127.82 × 552.08
  4. Step 4: Simplify right side
    818.10x = 622,651.76
  5. Step 5: Solve for x
    x = 622,651.76/818.10
  6. Step 6: Final answer
    x = 761.09

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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.