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Finding the Fourth Proportional to 908.77, 1,362.96 and 292.31

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Solution

The fourth proportional to 908.77, 1,362.96 and 292.31 is: 438.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.77 : 1,362.96 = 292.31 : x
  2. Step 2: Convert to fraction form
    908.77/1,362.96 = 292.31/x
  3. Step 3: Cross multiply
    908.77x = 1,362.96 × 292.31
  4. Step 4: Simplify right side
    908.77x = 398,406.84
  5. Step 5: Solve for x
    x = 398,406.84/908.77
  6. Step 6: Final answer
    x = 438.40

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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.