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Finding the Fourth Proportional to 438.01, 604.36 and 290.56

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Solution

The fourth proportional to 438.01, 604.36 and 290.56 is: 400.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.01 : 604.36 = 290.56 : x
  2. Step 2: Convert to fraction form
    438.01/604.36 = 290.56/x
  3. Step 3: Cross multiply
    438.01x = 604.36 × 290.56
  4. Step 4: Simplify right side
    438.01x = 175,602.84
  5. Step 5: Solve for x
    x = 175,602.84/438.01
  6. Step 6: Final answer
    x = 400.91

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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.