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Finding the Fourth Proportional to 518,884.45, 778,262.24 and 139,834.82

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Solution

The fourth proportional to 518,884.45, 778,262.24 and 139,834.82 is: 209,734.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,884.45 : 778,262.24 = 139,834.82 : x
  2. Step 2: Convert to fraction form
    518,884.45/778,262.24 = 139,834.82/x
  3. Step 3: Cross multiply
    518,884.45x = 778,262.24 × 139,834.82
  4. Step 4: Simplify right side
    518,884.45x = 108,828,162,538.44
  5. Step 5: Solve for x
    x = 108,828,162,538.44/518,884.45
  6. Step 6: Final answer
    x = 209,734.87

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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.