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Finding the Fourth Proportional to 975.74, 1,462.92 and 455.19

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Solution

The fourth proportional to 975.74, 1,462.92 and 455.19 is: 682.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    975.74 : 1,462.92 = 455.19 : x
  2. Step 2: Convert to fraction form
    975.74/1,462.92 = 455.19/x
  3. Step 3: Cross multiply
    975.74x = 1,462.92 × 455.19
  4. Step 4: Simplify right side
    975.74x = 665,906.55
  5. Step 5: Solve for x
    x = 665,906.55/975.74
  6. Step 6: Final answer
    x = 682.46

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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.