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Finding the Fourth Proportional to 210.36, 289.98 and 168.72

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Solution

The fourth proportional to 210.36, 289.98 and 168.72 is: 232.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.36 : 289.98 = 168.72 : x
  2. Step 2: Convert to fraction form
    210.36/289.98 = 168.72/x
  3. Step 3: Cross multiply
    210.36x = 289.98 × 168.72
  4. Step 4: Simplify right side
    210.36x = 48,925.43
  5. Step 5: Solve for x
    x = 48,925.43/210.36
  6. Step 6: Final answer
    x = 232.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.