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Finding the Fourth Proportional to 463.58, 695.44 and 138.91

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Solution

The fourth proportional to 463.58, 695.44 and 138.91 is: 208.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.58 : 695.44 = 138.91 : x
  2. Step 2: Convert to fraction form
    463.58/695.44 = 138.91/x
  3. Step 3: Cross multiply
    463.58x = 695.44 × 138.91
  4. Step 4: Simplify right side
    463.58x = 96,603.57
  5. Step 5: Solve for x
    x = 96,603.57/463.58
  6. Step 6: Final answer
    x = 208.39

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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.