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Finding the Fourth Proportional to 719.63, 992.97 and 424.85

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Solution

The fourth proportional to 719.63, 992.97 and 424.85 is: 586.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.63 : 992.97 = 424.85 : x
  2. Step 2: Convert to fraction form
    719.63/992.97 = 424.85/x
  3. Step 3: Cross multiply
    719.63x = 992.97 × 424.85
  4. Step 4: Simplify right side
    719.63x = 421,858.34
  5. Step 5: Solve for x
    x = 421,858.34/719.63
  6. Step 6: Final answer
    x = 586.22

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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.