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Finding the Fourth Proportional to 519.48, 719.87 and 500.31

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Solution

The fourth proportional to 519.48, 719.87 and 500.31 is: 693.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.48 : 719.87 = 500.31 : x
  2. Step 2: Convert to fraction form
    519.48/719.87 = 500.31/x
  3. Step 3: Cross multiply
    519.48x = 719.87 × 500.31
  4. Step 4: Simplify right side
    519.48x = 360,155.66
  5. Step 5: Solve for x
    x = 360,155.66/519.48
  6. Step 6: Final answer
    x = 693.30

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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.