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Finding the Fourth Proportional to 2,261.45, 3,392.29 and 617.79

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Solution

The fourth proportional to 2,261.45, 3,392.29 and 617.79 is: 926.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,261.45 : 3,392.29 = 617.79 : x
  2. Step 2: Convert to fraction form
    2,261.45/3,392.29 = 617.79/x
  3. Step 3: Cross multiply
    2,261.45x = 3,392.29 × 617.79
  4. Step 4: Simplify right side
    2,261.45x = 2,095,722.84
  5. Step 5: Solve for x
    x = 2,095,722.84/2,261.45
  6. Step 6: Final answer
    x = 926.72

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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.