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Finding the Fourth Proportional to 620.28, 929.81 and 400.86

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Solution

The fourth proportional to 620.28, 929.81 and 400.86 is: 600.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.28 : 929.81 = 400.86 : x
  2. Step 2: Convert to fraction form
    620.28/929.81 = 400.86/x
  3. Step 3: Cross multiply
    620.28x = 929.81 × 400.86
  4. Step 4: Simplify right side
    620.28x = 372,721.63
  5. Step 5: Solve for x
    x = 372,721.63/620.28
  6. Step 6: Final answer
    x = 600.89

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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.