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Finding the Fourth Proportional to 290.99, 401.56 and 160.00

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Solution

The fourth proportional to 290.99, 401.56 and 160.00 is: 220.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.99 : 401.56 = 160.00 : x
  2. Step 2: Convert to fraction form
    290.99/401.56 = 160.00/x
  3. Step 3: Cross multiply
    290.99x = 401.56 × 160.00
  4. Step 4: Simplify right side
    290.99x = 64,248.20
  5. Step 5: Solve for x
    x = 64,248.20/290.99
  6. Step 6: Final answer
    x = 220.79

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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.