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Finding the Fourth Proportional to 638.06, 880.45 and 358.27

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Solution

The fourth proportional to 638.06, 880.45 and 358.27 is: 494.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.06 : 880.45 = 358.27 : x
  2. Step 2: Convert to fraction form
    638.06/880.45 = 358.27/x
  3. Step 3: Cross multiply
    638.06x = 880.45 × 358.27
  4. Step 4: Simplify right side
    638.06x = 315,438.82
  5. Step 5: Solve for x
    x = 315,438.82/638.06
  6. Step 6: Final answer
    x = 494.37

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1.5x scale

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.