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Finding the Fourth Proportional to 2,644.59, 3,967.97 and 913.35

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Solution

The fourth proportional to 2,644.59, 3,967.97 and 913.35 is: 1,370.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,644.59 : 3,967.97 = 913.35 : x
  2. Step 2: Convert to fraction form
    2,644.59/3,967.97 = 913.35/x
  3. Step 3: Cross multiply
    2,644.59x = 3,967.97 × 913.35
  4. Step 4: Simplify right side
    2,644.59x = 3,624,140.83
  5. Step 5: Solve for x
    x = 3,624,140.83/2,644.59
  6. Step 6: Final answer
    x = 1,370.40

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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.