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Finding the Fourth Proportional to 2,331, 3,215.76 and 1,433.94

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Solution

The fourth proportional to 2,331, 3,215.76 and 1,433.94 is: 1,978.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,331 : 3,215.76 = 1,433.94 : x
  2. Step 2: Convert to fraction form
    2,331/3,215.76 = 1,433.94/x
  3. Step 3: Cross multiply
    2,331x = 3,215.76 × 1,433.94
  4. Step 4: Simplify right side
    2,331x = 4,611,206.89
  5. Step 5: Solve for x
    x = 4,611,206.89/2,331
  6. Step 6: Final answer
    x = 1,978.21

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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.