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Finding the Fourth Proportional to 719.61, 993.31 and 424.86

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Solution

The fourth proportional to 719.61, 993.31 and 424.86 is: 586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.61 : 993.31 = 424.86 : x
  2. Step 2: Convert to fraction form
    719.61/993.31 = 424.86/x
  3. Step 3: Cross multiply
    719.61x = 993.31 × 424.86
  4. Step 4: Simplify right side
    719.61x = 422,017.69
  5. Step 5: Solve for x
    x = 422,017.69/719.61
  6. Step 6: Final answer
    x = 586.45

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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.