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Finding the Fourth Proportional to 562.44, 776.99 and 438.51

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Solution

The fourth proportional to 562.44, 776.99 and 438.51 is: 605.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    562.44 : 776.99 = 438.51 : x
  2. Step 2: Convert to fraction form
    562.44/776.99 = 438.51/x
  3. Step 3: Cross multiply
    562.44x = 776.99 × 438.51
  4. Step 4: Simplify right side
    562.44x = 340,721.89
  5. Step 5: Solve for x
    x = 340,721.89/562.44
  6. Step 6: Final answer
    x = 605.79

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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.