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Finding the Fourth Proportional to 719,311, 992,649.18 and 401,359

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Solution

The fourth proportional to 719,311, 992,649.18 and 401,359 is: 553,875.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,311 : 992,649.18 = 401,359 : x
  2. Step 2: Convert to fraction form
    719,311/992,649.18 = 401,359/x
  3. Step 3: Cross multiply
    719,311x = 992,649.18 × 401,359
  4. Step 4: Simplify right side
    719,311x = 398,408,682,235.62
  5. Step 5: Solve for x
    x = 398,408,682,235.62/719,311
  6. Step 6: Final answer
    x = 553,875.42

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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.