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Finding the Fourth Proportional to 435.15, 652.40 and 203.91

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Solution

The fourth proportional to 435.15, 652.40 and 203.91 is: 305.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    435.15 : 652.40 = 203.91 : x
  2. Step 2: Convert to fraction form
    435.15/652.40 = 203.91/x
  3. Step 3: Cross multiply
    435.15x = 652.40 × 203.91
  4. Step 4: Simplify right side
    435.15x = 133,027.62
  5. Step 5: Solve for x
    x = 133,027.62/435.15
  6. Step 6: Final answer
    x = 305.71

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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.