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Finding the Fourth Proportional to 476,893.92, 715,451.52 and 139,920.96

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Solution

The fourth proportional to 476,893.92, 715,451.52 and 139,920.96 is: 209,913.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    476,893.92 : 715,451.52 = 139,920.96 : x
  2. Step 2: Convert to fraction form
    476,893.92/715,451.52 = 139,920.96/x
  3. Step 3: Cross multiply
    476,893.92x = 715,451.52 × 139,920.96
  4. Step 4: Simplify right side
    476,893.92x = 100,106,663,511.86
  5. Step 5: Solve for x
    x = 100,106,663,511.86/476,893.92
  6. Step 6: Final answer
    x = 209,913.90

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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.