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Finding the Fourth Proportional to 518,743.32, 778,049.37 and 139,694.31

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Solution

The fourth proportional to 518,743.32, 778,049.37 and 139,694.31 is: 209,523.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,743.32 : 778,049.37 = 139,694.31 : x
  2. Step 2: Convert to fraction form
    518,743.32/778,049.37 = 139,694.31/x
  3. Step 3: Cross multiply
    518,743.32x = 778,049.37 × 139,694.31
  4. Step 4: Simplify right side
    518,743.32x = 108,689,069,888.09
  5. Step 5: Solve for x
    x = 108,689,069,888.09/518,743.32
  6. Step 6: Final answer
    x = 209,523.80

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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.