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Finding the Fourth Proportional to 974.98, 1,345.50 and 576.46

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Solution

The fourth proportional to 974.98, 1,345.50 and 576.46 is: 795.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.98 : 1,345.50 = 576.46 : x
  2. Step 2: Convert to fraction form
    974.98/1,345.50 = 576.46/x
  3. Step 3: Cross multiply
    974.98x = 1,345.50 × 576.46
  4. Step 4: Simplify right side
    974.98x = 775,621.04
  5. Step 5: Solve for x
    x = 775,621.04/974.98
  6. Step 6: Final answer
    x = 795.53

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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.