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Finding the Fourth Proportional to 511.93, 705 and 438.22

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Solution

The fourth proportional to 511.93, 705 and 438.22 is: 603.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.93 : 705 = 438.22 : x
  2. Step 2: Convert to fraction form
    511.93/705 = 438.22/x
  3. Step 3: Cross multiply
    511.93x = 705 × 438.22
  4. Step 4: Simplify right side
    511.93x = 308,945.10
  5. Step 5: Solve for x
    x = 308,945.10/511.93
  6. Step 6: Final answer
    x = 603.49

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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.