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Finding the Fourth Proportional to 399,538.87, 551,327.47 and 225,137.47

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Solution

The fourth proportional to 399,538.87, 551,327.47 and 225,137.47 is: 310,669.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,538.87 : 551,327.47 = 225,137.47 : x
  2. Step 2: Convert to fraction form
    399,538.87/551,327.47 = 225,137.47/x
  3. Step 3: Cross multiply
    399,538.87x = 551,327.47 × 225,137.47
  4. Step 4: Simplify right side
    399,538.87x = 124,124,470,829.88
  5. Step 5: Solve for x
    x = 124,124,470,829.88/399,538.87
  6. Step 6: Final answer
    x = 310,669.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.