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Finding the Fourth Proportional to 630.99, 869.81 and 464.92

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Solution

The fourth proportional to 630.99, 869.81 and 464.92 is: 640.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.99 : 869.81 = 464.92 : x
  2. Step 2: Convert to fraction form
    630.99/869.81 = 464.92/x
  3. Step 3: Cross multiply
    630.99x = 869.81 × 464.92
  4. Step 4: Simplify right side
    630.99x = 404,392.46
  5. Step 5: Solve for x
    x = 404,392.46/630.99
  6. Step 6: Final answer
    x = 640.89

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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.