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Finding the Fourth Proportional to 386,649.70, 579,974.55 and 346,099.30

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Solution

The fourth proportional to 386,649.70, 579,974.55 and 346,099.30 is: 519,148.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,649.70 : 579,974.55 = 346,099.30 : x
  2. Step 2: Convert to fraction form
    386,649.70/579,974.55 = 346,099.30/x
  3. Step 3: Cross multiply
    386,649.70x = 579,974.55 × 346,099.30
  4. Step 4: Simplify right side
    386,649.70x = 200,728,785,772.82
  5. Step 5: Solve for x
    x = 200,728,785,772.82/386,649.70
  6. Step 6: Final answer
    x = 519,148.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.