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Finding the Fourth Proportional to 519.21, 719.92 and 501.86

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Solution

The fourth proportional to 519.21, 719.92 and 501.86 is: 695.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.21 : 719.92 = 501.86 : x
  2. Step 2: Convert to fraction form
    519.21/719.92 = 501.86/x
  3. Step 3: Cross multiply
    519.21x = 719.92 × 501.86
  4. Step 4: Simplify right side
    519.21x = 361,301.48
  5. Step 5: Solve for x
    x = 361,301.48/519.21
  6. Step 6: Final answer
    x = 695.87

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.