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Finding the Fourth Proportional to 719.08, 992.28 and 404.35

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Solution

The fourth proportional to 719.08, 992.28 and 404.35 is: 557.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.08 : 992.28 = 404.35 : x
  2. Step 2: Convert to fraction form
    719.08/992.28 = 404.35/x
  3. Step 3: Cross multiply
    719.08x = 992.28 × 404.35
  4. Step 4: Simplify right side
    719.08x = 401,228.42
  5. Step 5: Solve for x
    x = 401,228.42/719.08
  6. Step 6: Final answer
    x = 557.97

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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.