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Finding the Fourth Proportional to 438.51, 605.10 and 270.43

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Solution

The fourth proportional to 438.51, 605.10 and 270.43 is: 373.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.51 : 605.10 = 270.43 : x
  2. Step 2: Convert to fraction form
    438.51/605.10 = 270.43/x
  3. Step 3: Cross multiply
    438.51x = 605.10 × 270.43
  4. Step 4: Simplify right side
    438.51x = 163,637.19
  5. Step 5: Solve for x
    x = 163,637.19/438.51
  6. Step 6: Final answer
    x = 373.17

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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.