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Finding the Fourth Proportional to 811.31, 1,118.98 and 546.03

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Solution

The fourth proportional to 811.31, 1,118.98 and 546.03 is: 753.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.31 : 1,118.98 = 546.03 : x
  2. Step 2: Convert to fraction form
    811.31/1,118.98 = 546.03/x
  3. Step 3: Cross multiply
    811.31x = 1,118.98 × 546.03
  4. Step 4: Simplify right side
    811.31x = 610,997.33
  5. Step 5: Solve for x
    x = 610,997.33/811.31
  6. Step 6: Final answer
    x = 753.10

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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.