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Finding the Fourth Proportional to 694.45, 957.21 and 507.97

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Solution

The fourth proportional to 694.45, 957.21 and 507.97 is: 700.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.45 : 957.21 = 507.97 : x
  2. Step 2: Convert to fraction form
    694.45/957.21 = 507.97/x
  3. Step 3: Cross multiply
    694.45x = 957.21 × 507.97
  4. Step 4: Simplify right side
    694.45x = 486,233.96
  5. Step 5: Solve for x
    x = 486,233.96/694.45
  6. Step 6: Final answer
    x = 700.17

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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.