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Finding the Fourth Proportional to 862.98, 1,191.31 and 526.91

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Solution

The fourth proportional to 862.98, 1,191.31 and 526.91 is: 727.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.98 : 1,191.31 = 526.91 : x
  2. Step 2: Convert to fraction form
    862.98/1,191.31 = 526.91/x
  3. Step 3: Cross multiply
    862.98x = 1,191.31 × 526.91
  4. Step 4: Simplify right side
    862.98x = 627,705.88
  5. Step 5: Solve for x
    x = 627,705.88/862.98
  6. Step 6: Final answer
    x = 727.37

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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.