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Finding the Fourth Proportional to 803.45, 1,108.46 and 471.75

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Solution

The fourth proportional to 803.45, 1,108.46 and 471.75 is: 650.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.45 : 1,108.46 = 471.75 : x
  2. Step 2: Convert to fraction form
    803.45/1,108.46 = 471.75/x
  3. Step 3: Cross multiply
    803.45x = 1,108.46 × 471.75
  4. Step 4: Simplify right side
    803.45x = 522,913.65
  5. Step 5: Solve for x
    x = 522,913.65/803.45
  6. Step 6: Final answer
    x = 650.84

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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.