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Finding the Fourth Proportional to 507.95, 762.06 and 215.31

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Solution

The fourth proportional to 507.95, 762.06 and 215.31 is: 323.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.95 : 762.06 = 215.31 : x
  2. Step 2: Convert to fraction form
    507.95/762.06 = 215.31/x
  3. Step 3: Cross multiply
    507.95x = 762.06 × 215.31
  4. Step 4: Simplify right side
    507.95x = 164,077.09
  5. Step 5: Solve for x
    x = 164,077.09/507.95
  6. Step 6: Final answer
    x = 323.02

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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.