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Finding the Fourth Proportional to 2,792.90, 4,191.11 and 1,561.11

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Solution

The fourth proportional to 2,792.90, 4,191.11 and 1,561.11 is: 2,342.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,792.90 : 4,191.11 = 1,561.11 : x
  2. Step 2: Convert to fraction form
    2,792.90/4,191.11 = 1,561.11/x
  3. Step 3: Cross multiply
    2,792.90x = 4,191.11 × 1,561.11
  4. Step 4: Simplify right side
    2,792.90x = 6,542,792.47
  5. Step 5: Solve for x
    x = 6,542,792.47/2,792.90
  6. Step 6: Final answer
    x = 2,342.66

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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.