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Finding the Fourth Proportional to 607.40, 838.20 and 358.73

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Solution

The fourth proportional to 607.40, 838.20 and 358.73 is: 495.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    607.40 : 838.20 = 358.73 : x
  2. Step 2: Convert to fraction form
    607.40/838.20 = 358.73/x
  3. Step 3: Cross multiply
    607.40x = 838.20 × 358.73
  4. Step 4: Simplify right side
    607.40x = 300,687.49
  5. Step 5: Solve for x
    x = 300,687.49/607.40
  6. Step 6: Final answer
    x = 495.04

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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.