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Finding the Fourth Proportional to 818.00, 1,128.13 and 552.42

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Solution

The fourth proportional to 818.00, 1,128.13 and 552.42 is: 761.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    818.00 : 1,128.13 = 552.42 : x
  2. Step 2: Convert to fraction form
    818.00/1,128.13 = 552.42/x
  3. Step 3: Cross multiply
    818.00x = 1,128.13 × 552.42
  4. Step 4: Simplify right side
    818.00x = 623,200.19
  5. Step 5: Solve for x
    x = 623,200.19/818.00
  6. Step 6: Final answer
    x = 761.86

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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.