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Finding the Fourth Proportional to 429.37, 591.91 and 388.06

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Solution

The fourth proportional to 429.37, 591.91 and 388.06 is: 534.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.37 : 591.91 = 388.06 : x
  2. Step 2: Convert to fraction form
    429.37/591.91 = 388.06/x
  3. Step 3: Cross multiply
    429.37x = 591.91 × 388.06
  4. Step 4: Simplify right side
    429.37x = 229,694.14
  5. Step 5: Solve for x
    x = 229,694.14/429.37
  6. Step 6: Final answer
    x = 534.96

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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.