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Finding the Fourth Proportional to 811.06, 1,118.80 and 562.52

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Solution

The fourth proportional to 811.06, 1,118.80 and 562.52 is: 775.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.06 : 1,118.80 = 562.52 : x
  2. Step 2: Convert to fraction form
    811.06/1,118.80 = 562.52/x
  3. Step 3: Cross multiply
    811.06x = 1,118.80 × 562.52
  4. Step 4: Simplify right side
    811.06x = 629,347.38
  5. Step 5: Solve for x
    x = 629,347.38/811.06
  6. Step 6: Final answer
    x = 775.96

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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.