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Finding the Fourth Proportional to 719.72, 993.30 and 424.88

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Solution

The fourth proportional to 719.72, 993.30 and 424.88 is: 586.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.72 : 993.30 = 424.88 : x
  2. Step 2: Convert to fraction form
    719.72/993.30 = 424.88/x
  3. Step 3: Cross multiply
    719.72x = 993.30 × 424.88
  4. Step 4: Simplify right side
    719.72x = 422,033.30
  5. Step 5: Solve for x
    x = 422,033.30/719.72
  6. Step 6: Final answer
    x = 586.39

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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.