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Finding the Fourth Proportional to 3,398.88, 4,693.84 and 2,815.68

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Solution

The fourth proportional to 3,398.88, 4,693.84 and 2,815.68 is: 3,888.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398.88 : 4,693.84 = 2,815.68 : x
  2. Step 2: Convert to fraction form
    3,398.88/4,693.84 = 2,815.68/x
  3. Step 3: Cross multiply
    3,398.88x = 4,693.84 × 2,815.68
  4. Step 4: Simplify right side
    3,398.88x = 13,216,351.41
  5. Step 5: Solve for x
    x = 13,216,351.41/3,398.88
  6. Step 6: Final answer
    x = 3,888.44

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1.5x scale

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.