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Finding the Fourth Proportional to 388.83, 583.32 and 172.41

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Solution

The fourth proportional to 388.83, 583.32 and 172.41 is: 258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.83 : 583.32 = 172.41 : x
  2. Step 2: Convert to fraction form
    388.83/583.32 = 172.41/x
  3. Step 3: Cross multiply
    388.83x = 583.32 × 172.41
  4. Step 4: Simplify right side
    388.83x = 100,570.20
  5. Step 5: Solve for x
    x = 100,570.20/388.83
  6. Step 6: Final answer
    x = 258.65

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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.