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Finding the Fourth Proportional to 230.44, 317.50 and 156.63

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Solution

The fourth proportional to 230.44, 317.50 and 156.63 is: 215.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.44 : 317.50 = 156.63 : x
  2. Step 2: Convert to fraction form
    230.44/317.50 = 156.63/x
  3. Step 3: Cross multiply
    230.44x = 317.50 × 156.63
  4. Step 4: Simplify right side
    230.44x = 49,730.03
  5. Step 5: Solve for x
    x = 49,730.03/230.44
  6. Step 6: Final answer
    x = 215.80

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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.