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Finding the Fourth Proportional to 438,744.20, 656,804.10 and 261,159.80

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Solution

The fourth proportional to 438,744.20, 656,804.10 and 261,159.80 is: 390,958.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,744.20 : 656,804.10 = 261,159.80 : x
  2. Step 2: Convert to fraction form
    438,744.20/656,804.10 = 261,159.80/x
  3. Step 3: Cross multiply
    438,744.20x = 656,804.10 × 261,159.80
  4. Step 4: Simplify right side
    438,744.20x = 171,530,827,395.18
  5. Step 5: Solve for x
    x = 171,530,827,395.18/438,744.20
  6. Step 6: Final answer
    x = 390,958.62

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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.