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Finding the Fourth Proportional to 2,258.61, 3,388.23 and 698.74

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Solution

The fourth proportional to 2,258.61, 3,388.23 and 698.74 is: 1,048.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,258.61 : 3,388.23 = 698.74 : x
  2. Step 2: Convert to fraction form
    2,258.61/3,388.23 = 698.74/x
  3. Step 3: Cross multiply
    2,258.61x = 3,388.23 × 698.74
  4. Step 4: Simplify right side
    2,258.61x = 2,367,491.83
  5. Step 5: Solve for x
    x = 2,367,491.83/2,258.61
  6. Step 6: Final answer
    x = 1,048.21

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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.