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Finding the Fourth Proportional to 2,617.84, 3,926.90 and 670.06

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Solution

The fourth proportional to 2,617.84, 3,926.90 and 670.06 is: 1,005.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,617.84 : 3,926.90 = 670.06 : x
  2. Step 2: Convert to fraction form
    2,617.84/3,926.90 = 670.06/x
  3. Step 3: Cross multiply
    2,617.84x = 3,926.90 × 670.06
  4. Step 4: Simplify right side
    2,617.84x = 2,631,255.26
  5. Step 5: Solve for x
    x = 2,631,255.26/2,617.84
  6. Step 6: Final answer
    x = 1,005.12

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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.