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Finding the Fourth Proportional to 388.80, 585.14 and 351.06

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Solution

The fourth proportional to 388.80, 585.14 and 351.06 is: 528.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    388.80 : 585.14 = 351.06 : x
  2. Step 2: Convert to fraction form
    388.80/585.14 = 351.06/x
  3. Step 3: Cross multiply
    388.80x = 585.14 × 351.06
  4. Step 4: Simplify right side
    388.80x = 205,419.25
  5. Step 5: Solve for x
    x = 205,419.25/388.80
  6. Step 6: Final answer
    x = 528.34

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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.