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Finding the Fourth Proportional to 519.65, 716.65 and 342.77

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Solution

The fourth proportional to 519.65, 716.65 and 342.77 is: 472.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.65 : 716.65 = 342.77 : x
  2. Step 2: Convert to fraction form
    519.65/716.65 = 342.77/x
  3. Step 3: Cross multiply
    519.65x = 716.65 × 342.77
  4. Step 4: Simplify right side
    519.65x = 245,641.68
  5. Step 5: Solve for x
    x = 245,641.68/519.65
  6. Step 6: Final answer
    x = 472.71

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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.