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Finding the Fourth Proportional to 624.66, 853.29 and 620.61

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Solution

The fourth proportional to 624.66, 853.29 and 620.61 is: 847.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.66 : 853.29 = 620.61 : x
  2. Step 2: Convert to fraction form
    624.66/853.29 = 620.61/x
  3. Step 3: Cross multiply
    624.66x = 853.29 × 620.61
  4. Step 4: Simplify right side
    624.66x = 529,560.31
  5. Step 5: Solve for x
    x = 529,560.31/624.66
  6. Step 6: Final answer
    x = 847.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.