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Finding the Fourth Proportional to 626.58, 857.88 and 620.64

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Solution

The fourth proportional to 626.58, 857.88 and 620.64 is: 849.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.58 : 857.88 = 620.64 : x
  2. Step 2: Convert to fraction form
    626.58/857.88 = 620.64/x
  3. Step 3: Cross multiply
    626.58x = 857.88 × 620.64
  4. Step 4: Simplify right side
    626.58x = 532,434.64
  5. Step 5: Solve for x
    x = 532,434.64/626.58
  6. Step 6: Final answer
    x = 849.75

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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.