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Finding the Fourth Proportional to 803.36, 1,108.82 and 509.03

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Solution

The fourth proportional to 803.36, 1,108.82 and 509.03 is: 702.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.36 : 1,108.82 = 509.03 : x
  2. Step 2: Convert to fraction form
    803.36/1,108.82 = 509.03/x
  3. Step 3: Cross multiply
    803.36x = 1,108.82 × 509.03
  4. Step 4: Simplify right side
    803.36x = 564,414.56
  5. Step 5: Solve for x
    x = 564,414.56/803.36
  6. Step 6: Final answer
    x = 702.57

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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.