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Finding the Fourth Proportional to 210.16, 314.79 and 155.17

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Solution

The fourth proportional to 210.16, 314.79 and 155.17 is: 232.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.16 : 314.79 = 155.17 : x
  2. Step 2: Convert to fraction form
    210.16/314.79 = 155.17/x
  3. Step 3: Cross multiply
    210.16x = 314.79 × 155.17
  4. Step 4: Simplify right side
    210.16x = 48,845.96
  5. Step 5: Solve for x
    x = 48,845.96/210.16
  6. Step 6: Final answer
    x = 232.42

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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.