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Finding the Fourth Proportional to 719.19, 992.45 and 424.44

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Solution

The fourth proportional to 719.19, 992.45 and 424.44 is: 585.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.19 : 992.45 = 424.44 : x
  2. Step 2: Convert to fraction form
    719.19/992.45 = 424.44/x
  3. Step 3: Cross multiply
    719.19x = 992.45 × 424.44
  4. Step 4: Simplify right side
    719.19x = 421,233.36
  5. Step 5: Solve for x
    x = 421,233.36/719.19
  6. Step 6: Final answer
    x = 585.71

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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.