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Finding the Fourth Proportional to 438.19, 656.87 and 194.98

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Solution

The fourth proportional to 438.19, 656.87 and 194.98 is: 292.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.19 : 656.87 = 194.98 : x
  2. Step 2: Convert to fraction form
    438.19/656.87 = 194.98/x
  3. Step 3: Cross multiply
    438.19x = 656.87 × 194.98
  4. Step 4: Simplify right side
    438.19x = 128,076.51
  5. Step 5: Solve for x
    x = 128,076.51/438.19
  6. Step 6: Final answer
    x = 292.29

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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.