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Finding the Fourth Proportional to 2,111.40, 3,167.40 and 650.16

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Solution

The fourth proportional to 2,111.40, 3,167.40 and 650.16 is: 975.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,111.40 : 3,167.40 = 650.16 : x
  2. Step 2: Convert to fraction form
    2,111.40/3,167.40 = 650.16/x
  3. Step 3: Cross multiply
    2,111.40x = 3,167.40 × 650.16
  4. Step 4: Simplify right side
    2,111.40x = 2,059,316.78
  5. Step 5: Solve for x
    x = 2,059,316.78/2,111.40
  6. Step 6: Final answer
    x = 975.33

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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.