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Finding the Fourth Proportional to 2,653.48, 3,979.95 and 705.88

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Solution

The fourth proportional to 2,653.48, 3,979.95 and 705.88 is: 1,058.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,653.48 : 3,979.95 = 705.88 : x
  2. Step 2: Convert to fraction form
    2,653.48/3,979.95 = 705.88/x
  3. Step 3: Cross multiply
    2,653.48x = 3,979.95 × 705.88
  4. Step 4: Simplify right side
    2,653.48x = 2,809,367.11
  5. Step 5: Solve for x
    x = 2,809,367.11/2,653.48
  6. Step 6: Final answer
    x = 1,058.75

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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.