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Finding the Fourth Proportional to 534.91, 800.65 and 388.15

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Solution

The fourth proportional to 534.91, 800.65 and 388.15 is: 580.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    534.91 : 800.65 = 388.15 : x
  2. Step 2: Convert to fraction form
    534.91/800.65 = 388.15/x
  3. Step 3: Cross multiply
    534.91x = 800.65 × 388.15
  4. Step 4: Simplify right side
    534.91x = 310,772.30
  5. Step 5: Solve for x
    x = 310,772.30/534.91
  6. Step 6: Final answer
    x = 580.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.