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Finding the Fourth Proportional to 518,940.14, 778,352.29 and 139,898.61

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Solution

The fourth proportional to 518,940.14, 778,352.29 and 139,898.61 is: 209,832.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,940.14 : 778,352.29 = 139,898.61 : x
  2. Step 2: Convert to fraction form
    518,940.14/778,352.29 = 139,898.61/x
  3. Step 3: Cross multiply
    518,940.14x = 778,352.29 × 139,898.61
  4. Step 4: Simplify right side
    518,940.14x = 108,890,403,111.57
  5. Step 5: Solve for x
    x = 108,890,403,111.57/518,940.14
  6. Step 6: Final answer
    x = 209,832.30

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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.