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Finding the Fourth Proportional to 438.54, 601.98 and 388.32

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Solution

The fourth proportional to 438.54, 601.98 and 388.32 is: 533.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.54 : 601.98 = 388.32 : x
  2. Step 2: Convert to fraction form
    438.54/601.98 = 388.32/x
  3. Step 3: Cross multiply
    438.54x = 601.98 × 388.32
  4. Step 4: Simplify right side
    438.54x = 233,760.87
  5. Step 5: Solve for x
    x = 233,760.87/438.54
  6. Step 6: Final answer
    x = 533.04

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.