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Finding the Fourth Proportional to 974.16, 1,460.22 and 426.19

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Solution

The fourth proportional to 974.16, 1,460.22 and 426.19 is: 638.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    974.16 : 1,460.22 = 426.19 : x
  2. Step 2: Convert to fraction form
    974.16/1,460.22 = 426.19/x
  3. Step 3: Cross multiply
    974.16x = 1,460.22 × 426.19
  4. Step 4: Simplify right side
    974.16x = 622,331.16
  5. Step 5: Solve for x
    x = 622,331.16/974.16
  6. Step 6: Final answer
    x = 638.84

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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.