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Finding the Fourth Proportional to 639.52, 959.55 and 350.62

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Solution

The fourth proportional to 639.52, 959.55 and 350.62 is: 526.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    639.52 : 959.55 = 350.62 : x
  2. Step 2: Convert to fraction form
    639.52/959.55 = 350.62/x
  3. Step 3: Cross multiply
    639.52x = 959.55 × 350.62
  4. Step 4: Simplify right side
    639.52x = 336,430.87
  5. Step 5: Solve for x
    x = 336,430.87/639.52
  6. Step 6: Final answer
    x = 526.07

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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.