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Finding the Fourth Proportional to 1,653.50, 2,480.12 and 679.58

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Solution

The fourth proportional to 1,653.50, 2,480.12 and 679.58 is: 1,019.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,653.50 : 2,480.12 = 679.58 : x
  2. Step 2: Convert to fraction form
    1,653.50/2,480.12 = 679.58/x
  3. Step 3: Cross multiply
    1,653.50x = 2,480.12 × 679.58
  4. Step 4: Simplify right side
    1,653.50x = 1,685,439.95
  5. Step 5: Solve for x
    x = 1,685,439.95/1,653.50
  6. Step 6: Final answer
    x = 1,019.32

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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.