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Finding the Fourth Proportional to 2,312.41, 3,191.13 and 1,264.48

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Solution

The fourth proportional to 2,312.41, 3,191.13 and 1,264.48 is: 1,744.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,312.41 : 3,191.13 = 1,264.48 : x
  2. Step 2: Convert to fraction form
    2,312.41/3,191.13 = 1,264.48/x
  3. Step 3: Cross multiply
    2,312.41x = 3,191.13 × 1,264.48
  4. Step 4: Simplify right side
    2,312.41x = 4,035,120.06
  5. Step 5: Solve for x
    x = 4,035,120.06/2,312.41
  6. Step 6: Final answer
    x = 1,744.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.