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Finding the Fourth Proportional to 5,315.88, 7,962.88 and 3,119.32

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Solution

The fourth proportional to 5,315.88, 7,962.88 and 3,119.32 is: 4,672.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,315.88 : 7,962.88 = 3,119.32 : x
  2. Step 2: Convert to fraction form
    5,315.88/7,962.88 = 3,119.32/x
  3. Step 3: Cross multiply
    5,315.88x = 7,962.88 × 3,119.32
  4. Step 4: Simplify right side
    5,315.88x = 24,838,770.84
  5. Step 5: Solve for x
    x = 24,838,770.84/5,315.88
  6. Step 6: Final answer
    x = 4,672.56

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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.