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Finding the Fourth Proportional to 519.23, 716.71 and 312.23

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Solution

The fourth proportional to 519.23, 716.71 and 312.23 is: 430.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.23 : 716.71 = 312.23 : x
  2. Step 2: Convert to fraction form
    519.23/716.71 = 312.23/x
  3. Step 3: Cross multiply
    519.23x = 716.71 × 312.23
  4. Step 4: Simplify right side
    519.23x = 223,778.36
  5. Step 5: Solve for x
    x = 223,778.36/519.23
  6. Step 6: Final answer
    x = 430.98

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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.