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Finding the Fourth Proportional to 810.82, 1,118.73 and 544.79

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Solution

The fourth proportional to 810.82, 1,118.73 and 544.79 is: 751.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.82 : 1,118.73 = 544.79 : x
  2. Step 2: Convert to fraction form
    810.82/1,118.73 = 544.79/x
  3. Step 3: Cross multiply
    810.82x = 1,118.73 × 544.79
  4. Step 4: Simplify right side
    810.82x = 609,479.85
  5. Step 5: Solve for x
    x = 609,479.85/810.82
  6. Step 6: Final answer
    x = 751.68

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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.