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Finding the Fourth Proportional to 803.34, 1,108.52 and 488.68

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Solution

The fourth proportional to 803.34, 1,108.52 and 488.68 is: 674.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.34 : 1,108.52 = 488.68 : x
  2. Step 2: Convert to fraction form
    803.34/1,108.52 = 488.68/x
  3. Step 3: Cross multiply
    803.34x = 1,108.52 × 488.68
  4. Step 4: Simplify right side
    803.34x = 541,711.55
  5. Step 5: Solve for x
    x = 541,711.55/803.34
  6. Step 6: Final answer
    x = 674.32

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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.