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Finding the Fourth Proportional to 627.79, 866.40 and 348.06

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Solution

The fourth proportional to 627.79, 866.40 and 348.06 is: 480.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.79 : 866.40 = 348.06 : x
  2. Step 2: Convert to fraction form
    627.79/866.40 = 348.06/x
  3. Step 3: Cross multiply
    627.79x = 866.40 × 348.06
  4. Step 4: Simplify right side
    627.79x = 301,556.75
  5. Step 5: Solve for x
    x = 301,556.75/627.79
  6. Step 6: Final answer
    x = 480.34

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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.