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Finding the Fourth Proportional to 803.30, 1,108.12 and 540.86

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Solution

The fourth proportional to 803.30, 1,108.12 and 540.86 is: 746.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.30 : 1,108.12 = 540.86 : x
  2. Step 2: Convert to fraction form
    803.30/1,108.12 = 540.86/x
  3. Step 3: Cross multiply
    803.30x = 1,108.12 × 540.86
  4. Step 4: Simplify right side
    803.30x = 599,337.78
  5. Step 5: Solve for x
    x = 599,337.78/803.30
  6. Step 6: Final answer
    x = 746.09

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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.