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Finding the Fourth Proportional to 210.92, 317.58 and 157.20

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Solution

The fourth proportional to 210.92, 317.58 and 157.20 is: 236.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    210.92 : 317.58 = 157.20 : x
  2. Step 2: Convert to fraction form
    210.92/317.58 = 157.20/x
  3. Step 3: Cross multiply
    210.92x = 317.58 × 157.20
  4. Step 4: Simplify right side
    210.92x = 49,923.58
  5. Step 5: Solve for x
    x = 49,923.58/210.92
  6. Step 6: Final answer
    x = 236.69

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.