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Finding the Fourth Proportional to 803.22, 1,108.40 and 471.71

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Solution

The fourth proportional to 803.22, 1,108.40 and 471.71 is: 650.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.22 : 1,108.40 = 471.71 : x
  2. Step 2: Convert to fraction form
    803.22/1,108.40 = 471.71/x
  3. Step 3: Cross multiply
    803.22x = 1,108.40 × 471.71
  4. Step 4: Simplify right side
    803.22x = 522,835.46
  5. Step 5: Solve for x
    x = 522,835.46/803.22
  6. Step 6: Final answer
    x = 650.92

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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.