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Finding the Fourth Proportional to 699.57, 964.42 and 500.49

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Solution

The fourth proportional to 699.57, 964.42 and 500.49 is: 689.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.57 : 964.42 = 500.49 : x
  2. Step 2: Convert to fraction form
    699.57/964.42 = 500.49/x
  3. Step 3: Cross multiply
    699.57x = 964.42 × 500.49
  4. Step 4: Simplify right side
    699.57x = 482,682.57
  5. Step 5: Solve for x
    x = 482,682.57/699.57
  6. Step 6: Final answer
    x = 689.97

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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.