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Finding the Fourth Proportional to 620.46, 856.02 and 371.82

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Solution

The fourth proportional to 620.46, 856.02 and 371.82 is: 512.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.46 : 856.02 = 371.82 : x
  2. Step 2: Convert to fraction form
    620.46/856.02 = 371.82/x
  3. Step 3: Cross multiply
    620.46x = 856.02 × 371.82
  4. Step 4: Simplify right side
    620.46x = 318,285.36
  5. Step 5: Solve for x
    x = 318,285.36/620.46
  6. Step 6: Final answer
    x = 512.98

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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.