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Finding the Fourth Proportional to 556.31, 834.79 and 309.72

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Solution

The fourth proportional to 556.31, 834.79 and 309.72 is: 464.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.31 : 834.79 = 309.72 : x
  2. Step 2: Convert to fraction form
    556.31/834.79 = 309.72/x
  3. Step 3: Cross multiply
    556.31x = 834.79 × 309.72
  4. Step 4: Simplify right side
    556.31x = 258,551.16
  5. Step 5: Solve for x
    x = 258,551.16/556.31
  6. Step 6: Final answer
    x = 464.76

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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.