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Finding the Fourth Proportional to 388.97, 579.98 and 372.77

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Solution

The fourth proportional to 388.97, 579.98 and 372.77 is: 555.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.97 : 579.98 = 372.77 : x
  2. Step 2: Convert to fraction form
    388.97/579.98 = 372.77/x
  3. Step 3: Cross multiply
    388.97x = 579.98 × 372.77
  4. Step 4: Simplify right side
    388.97x = 216,194.38
  5. Step 5: Solve for x
    x = 216,194.38/388.97
  6. Step 6: Final answer
    x = 555.82

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.