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Finding the Fourth Proportional to 230.08, 317.53 and 156.40

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Solution

The fourth proportional to 230.08, 317.53 and 156.40 is: 215.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.08 : 317.53 = 156.40 : x
  2. Step 2: Convert to fraction form
    230.08/317.53 = 156.40/x
  3. Step 3: Cross multiply
    230.08x = 317.53 × 156.40
  4. Step 4: Simplify right side
    230.08x = 49,661.69
  5. Step 5: Solve for x
    x = 49,661.69/230.08
  6. Step 6: Final answer
    x = 215.85

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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.