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Finding the Fourth Proportional to 388.39, 536.22 and 346.87

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Solution

The fourth proportional to 388.39, 536.22 and 346.87 is: 478.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.39 : 536.22 = 346.87 : x
  2. Step 2: Convert to fraction form
    388.39/536.22 = 346.87/x
  3. Step 3: Cross multiply
    388.39x = 536.22 × 346.87
  4. Step 4: Simplify right side
    388.39x = 185,998.63
  5. Step 5: Solve for x
    x = 185,998.63/388.39
  6. Step 6: Final answer
    x = 478.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.