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Finding the Fourth Proportional to 388.01, 581.99 and 127.98

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Solution

The fourth proportional to 388.01, 581.99 and 127.98 is: 191.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.01 : 581.99 = 127.98 : x
  2. Step 2: Convert to fraction form
    388.01/581.99 = 127.98/x
  3. Step 3: Cross multiply
    388.01x = 581.99 × 127.98
  4. Step 4: Simplify right side
    388.01x = 74,483.08
  5. Step 5: Solve for x
    x = 74,483.08/388.01
  6. Step 6: Final answer
    x = 191.96

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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.