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Finding the Fourth Proportional to 2,644.84, 3,968.34 and 913.60

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Solution

The fourth proportional to 2,644.84, 3,968.34 and 913.60 is: 1,370.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,644.84 : 3,968.34 = 913.60 : x
  2. Step 2: Convert to fraction form
    2,644.84/3,968.34 = 913.60/x
  3. Step 3: Cross multiply
    2,644.84x = 3,968.34 × 913.60
  4. Step 4: Simplify right side
    2,644.84x = 3,625,475.42
  5. Step 5: Solve for x
    x = 3,625,475.42/2,644.84
  6. Step 6: Final answer
    x = 1,370.77

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1.5x scale

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.