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Finding the Fourth Proportional to 388.09, 581.95 and 156.92

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Solution

The fourth proportional to 388.09, 581.95 and 156.92 is: 235.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.09 : 581.95 = 156.92 : x
  2. Step 2: Convert to fraction form
    388.09/581.95 = 156.92/x
  3. Step 3: Cross multiply
    388.09x = 581.95 × 156.92
  4. Step 4: Simplify right side
    388.09x = 91,320.15
  5. Step 5: Solve for x
    x = 91,320.15/388.09
  6. Step 6: Final answer
    x = 235.31

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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.