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Finding the Fourth Proportional to 2,657.93, 3,986.89 and 926.15

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Solution

The fourth proportional to 2,657.93, 3,986.89 and 926.15 is: 1,389.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.93 : 3,986.89 = 926.15 : x
  2. Step 2: Convert to fraction form
    2,657.93/3,986.89 = 926.15/x
  3. Step 3: Cross multiply
    2,657.93x = 3,986.89 × 926.15
  4. Step 4: Simplify right side
    2,657.93x = 3,692,435.92
  5. Step 5: Solve for x
    x = 3,692,435.92/2,657.93
  6. Step 6: Final answer
    x = 1,389.22

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Similar ratio
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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.