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Finding the Fourth Proportional to 974.66, 1,344.99 and 554.98

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Solution

The fourth proportional to 974.66, 1,344.99 and 554.98 is: 765.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.66 : 1,344.99 = 554.98 : x
  2. Step 2: Convert to fraction form
    974.66/1,344.99 = 554.98/x
  3. Step 3: Cross multiply
    974.66x = 1,344.99 × 554.98
  4. Step 4: Simplify right side
    974.66x = 746,435.83
  5. Step 5: Solve for x
    x = 746,435.83/974.66
  6. Step 6: Final answer
    x = 765.85

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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.