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Finding the Fourth Proportional to 438.14, 603.97 and 290.51

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Solution

The fourth proportional to 438.14, 603.97 and 290.51 is: 400.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.14 : 603.97 = 290.51 : x
  2. Step 2: Convert to fraction form
    438.14/603.97 = 290.51/x
  3. Step 3: Cross multiply
    438.14x = 603.97 × 290.51
  4. Step 4: Simplify right side
    438.14x = 175,460.11
  5. Step 5: Solve for x
    x = 175,460.11/438.14
  6. Step 6: Final answer
    x = 400.47

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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.