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Finding the Fourth Proportional to 438.90, 657.98 and 164.93

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Solution

The fourth proportional to 438.90, 657.98 and 164.93 is: 247.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.90 : 657.98 = 164.93 : x
  2. Step 2: Convert to fraction form
    438.90/657.98 = 164.93/x
  3. Step 3: Cross multiply
    438.90x = 657.98 × 164.93
  4. Step 4: Simplify right side
    438.90x = 108,516.53
  5. Step 5: Solve for x
    x = 108,516.53/438.90
  6. Step 6: Final answer
    x = 247.25

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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.