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Finding the Fourth Proportional to 630.61, 943.79 and 519.64

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Solution

The fourth proportional to 630.61, 943.79 and 519.64 is: 777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.61 : 943.79 = 519.64 : x
  2. Step 2: Convert to fraction form
    630.61/943.79 = 519.64/x
  3. Step 3: Cross multiply
    630.61x = 943.79 × 519.64
  4. Step 4: Simplify right side
    630.61x = 490,426.08
  5. Step 5: Solve for x
    x = 490,426.08/630.61
  6. Step 6: Final answer
    x = 777.70

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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.