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Finding the Fourth Proportional to 719.19, 992.41 and 424.42

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Solution

The fourth proportional to 719.19, 992.41 and 424.42 is: 585.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.19 : 992.41 = 424.42 : x
  2. Step 2: Convert to fraction form
    719.19/992.41 = 424.42/x
  3. Step 3: Cross multiply
    719.19x = 992.41 × 424.42
  4. Step 4: Simplify right side
    719.19x = 421,195.11
  5. Step 5: Solve for x
    x = 421,195.11/719.19
  6. Step 6: Final answer
    x = 585.65

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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.