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Finding the Fourth Proportional to 507.06, 699.62 and 310.57

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Solution

The fourth proportional to 507.06, 699.62 and 310.57 is: 428.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.06 : 699.62 = 310.57 : x
  2. Step 2: Convert to fraction form
    507.06/699.62 = 310.57/x
  3. Step 3: Cross multiply
    507.06x = 699.62 × 310.57
  4. Step 4: Simplify right side
    507.06x = 217,277.68
  5. Step 5: Solve for x
    x = 217,277.68/507.06
  6. Step 6: Final answer
    x = 428.50

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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.