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Finding the Fourth Proportional to 2,791.32, 4,187.64 and 1,971.18

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Solution

The fourth proportional to 2,791.32, 4,187.64 and 1,971.18 is: 2,957.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,791.32 : 4,187.64 = 1,971.18 : x
  2. Step 2: Convert to fraction form
    2,791.32/4,187.64 = 1,971.18/x
  3. Step 3: Cross multiply
    2,791.32x = 4,187.64 × 1,971.18
  4. Step 4: Simplify right side
    2,791.32x = 8,254,592.22
  5. Step 5: Solve for x
    x = 8,254,592.22/2,791.32
  6. Step 6: Final answer
    x = 2,957.24

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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.