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Finding the Fourth Proportional to 638.93, 957.59 and 346.42

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Solution

The fourth proportional to 638.93, 957.59 and 346.42 is: 519.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.93 : 957.59 = 346.42 : x
  2. Step 2: Convert to fraction form
    638.93/957.59 = 346.42/x
  3. Step 3: Cross multiply
    638.93x = 957.59 × 346.42
  4. Step 4: Simplify right side
    638.93x = 331,728.33
  5. Step 5: Solve for x
    x = 331,728.33/638.93
  6. Step 6: Final answer
    x = 519.19

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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.