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Finding the Fourth Proportional to 290.03, 435.15 and 143.84

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Solution

The fourth proportional to 290.03, 435.15 and 143.84 is: 215.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.03 : 435.15 = 143.84 : x
  2. Step 2: Convert to fraction form
    290.03/435.15 = 143.84/x
  3. Step 3: Cross multiply
    290.03x = 435.15 × 143.84
  4. Step 4: Simplify right side
    290.03x = 62,591.98
  5. Step 5: Solve for x
    x = 62,591.98/290.03
  6. Step 6: Final answer
    x = 215.81

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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.