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Finding the Fourth Proportional to 841.97, 1,261.59 and 549.12

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Solution

The fourth proportional to 841.97, 1,261.59 and 549.12 is: 822.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.97 : 1,261.59 = 549.12 : x
  2. Step 2: Convert to fraction form
    841.97/1,261.59 = 549.12/x
  3. Step 3: Cross multiply
    841.97x = 1,261.59 × 549.12
  4. Step 4: Simplify right side
    841.97x = 692,764.30
  5. Step 5: Solve for x
    x = 692,764.30/841.97
  6. Step 6: Final answer
    x = 822.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.