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Finding the Fourth Proportional to 808.98, 1,116.62 and 528.72

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Solution

The fourth proportional to 808.98, 1,116.62 and 528.72 is: 729.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.98 : 1,116.62 = 528.72 : x
  2. Step 2: Convert to fraction form
    808.98/1,116.62 = 528.72/x
  3. Step 3: Cross multiply
    808.98x = 1,116.62 × 528.72
  4. Step 4: Simplify right side
    808.98x = 590,379.33
  5. Step 5: Solve for x
    x = 590,379.33/808.98
  6. Step 6: Final answer
    x = 729.78

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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.