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Finding the Fourth Proportional to 388.16, 535.30 and 240.74

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Solution

The fourth proportional to 388.16, 535.30 and 240.74 is: 331.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.16 : 535.30 = 240.74 : x
  2. Step 2: Convert to fraction form
    388.16/535.30 = 240.74/x
  3. Step 3: Cross multiply
    388.16x = 535.30 × 240.74
  4. Step 4: Simplify right side
    388.16x = 128,864.84
  5. Step 5: Solve for x
    x = 128,864.84/388.16
  6. Step 6: Final answer
    x = 331.99

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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.