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Finding the Fourth Proportional to 2,258.76, 3,388.14 and 719.80

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Solution

The fourth proportional to 2,258.76, 3,388.14 and 719.80 is: 1,079.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,258.76 : 3,388.14 = 719.80 : x
  2. Step 2: Convert to fraction form
    2,258.76/3,388.14 = 719.80/x
  3. Step 3: Cross multiply
    2,258.76x = 3,388.14 × 719.80
  4. Step 4: Simplify right side
    2,258.76x = 2,438,783.17
  5. Step 5: Solve for x
    x = 2,438,783.17/2,258.76
  6. Step 6: Final answer
    x = 1,079.70

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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.