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Finding the Fourth Proportional to 290.49, 435.80 and 144.32

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Solution

The fourth proportional to 290.49, 435.80 and 144.32 is: 216.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.49 : 435.80 = 144.32 : x
  2. Step 2: Convert to fraction form
    290.49/435.80 = 144.32/x
  3. Step 3: Cross multiply
    290.49x = 435.80 × 144.32
  4. Step 4: Simplify right side
    290.49x = 62,894.48
  5. Step 5: Solve for x
    x = 62,894.48/290.49
  6. Step 6: Final answer
    x = 216.51

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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.