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Finding the Fourth Proportional to 388.84, 581.78 and 240.62

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Solution

The fourth proportional to 388.84, 581.78 and 240.62 is: 360.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.84 : 581.78 = 240.62 : x
  2. Step 2: Convert to fraction form
    388.84/581.78 = 240.62/x
  3. Step 3: Cross multiply
    388.84x = 581.78 × 240.62
  4. Step 4: Simplify right side
    388.84x = 139,987.90
  5. Step 5: Solve for x
    x = 139,987.90/388.84
  6. Step 6: Final answer
    x = 360.01

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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.