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Finding the Fourth Proportional to 388.96, 584.64 and 369.76

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Solution

The fourth proportional to 388.96, 584.64 and 369.76 is: 555.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.96 : 584.64 = 369.76 : x
  2. Step 2: Convert to fraction form
    388.96/584.64 = 369.76/x
  3. Step 3: Cross multiply
    388.96x = 584.64 × 369.76
  4. Step 4: Simplify right side
    388.96x = 216,176.49
  5. Step 5: Solve for x
    x = 216,176.49/388.96
  6. Step 6: Final answer
    x = 555.78

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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.