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Finding the Fourth Proportional to 803.24, 1,108.50 and 492.68

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Solution

The fourth proportional to 803.24, 1,108.50 and 492.68 is: 679.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.24 : 1,108.50 = 492.68 : x
  2. Step 2: Convert to fraction form
    803.24/1,108.50 = 492.68/x
  3. Step 3: Cross multiply
    803.24x = 1,108.50 × 492.68
  4. Step 4: Simplify right side
    803.24x = 546,135.78
  5. Step 5: Solve for x
    x = 546,135.78/803.24
  6. Step 6: Final answer
    x = 679.92

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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.