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Finding the Fourth Proportional to 388.19, 583.20 and 272.92

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Solution

The fourth proportional to 388.19, 583.20 and 272.92 is: 410.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.19 : 583.20 = 272.92 : x
  2. Step 2: Convert to fraction form
    388.19/583.20 = 272.92/x
  3. Step 3: Cross multiply
    388.19x = 583.20 × 272.92
  4. Step 4: Simplify right side
    388.19x = 159,166.58
  5. Step 5: Solve for x
    x = 159,166.58/388.19
  6. Step 6: Final answer
    x = 410.02

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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.