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Finding the Fourth Proportional to 626.38, 864.72 and 486.19

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Solution

The fourth proportional to 626.38, 864.72 and 486.19 is: 671.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.38 : 864.72 = 486.19 : x
  2. Step 2: Convert to fraction form
    626.38/864.72 = 486.19/x
  3. Step 3: Cross multiply
    626.38x = 864.72 × 486.19
  4. Step 4: Simplify right side
    626.38x = 420,418.22
  5. Step 5: Solve for x
    x = 420,418.22/626.38
  6. Step 6: Final answer
    x = 671.19

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1.5x scale

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.