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Finding the Fourth Proportional to 290.07, 433.16 and 238.56

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Solution

The fourth proportional to 290.07, 433.16 and 238.56 is: 356.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.07 : 433.16 = 238.56 : x
  2. Step 2: Convert to fraction form
    290.07/433.16 = 238.56/x
  3. Step 3: Cross multiply
    290.07x = 433.16 × 238.56
  4. Step 4: Simplify right side
    290.07x = 103,333.46
  5. Step 5: Solve for x
    x = 103,333.46/290.07
  6. Step 6: Final answer
    x = 356.24

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.