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Finding the Fourth Proportional to 438.04, 656.58 and 194.38

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Solution

The fourth proportional to 438.04, 656.58 and 194.38 is: 291.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.04 : 656.58 = 194.38 : x
  2. Step 2: Convert to fraction form
    438.04/656.58 = 194.38/x
  3. Step 3: Cross multiply
    438.04x = 656.58 × 194.38
  4. Step 4: Simplify right side
    438.04x = 127,626.02
  5. Step 5: Solve for x
    x = 127,626.02/438.04
  6. Step 6: Final answer
    x = 291.36

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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.