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Finding the Fourth Proportional to 708.08, 976.97 and 519.30

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Solution

The fourth proportional to 708.08, 976.97 and 519.30 is: 716.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.08 : 976.97 = 519.30 : x
  2. Step 2: Convert to fraction form
    708.08/976.97 = 519.30/x
  3. Step 3: Cross multiply
    708.08x = 976.97 × 519.30
  4. Step 4: Simplify right side
    708.08x = 507,337.92
  5. Step 5: Solve for x
    x = 507,337.92/708.08
  6. Step 6: Final answer
    x = 716.50

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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.