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Finding the Fourth Proportional to 507.35, 695.78 and 486.31

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Solution

The fourth proportional to 507.35, 695.78 and 486.31 is: 666.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.35 : 695.78 = 486.31 : x
  2. Step 2: Convert to fraction form
    507.35/695.78 = 486.31/x
  3. Step 3: Cross multiply
    507.35x = 695.78 × 486.31
  4. Step 4: Simplify right side
    507.35x = 338,362.34
  5. Step 5: Solve for x
    x = 338,362.34/507.35
  6. Step 6: Final answer
    x = 666.92

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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.