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Finding the Fourth Proportional to 439,888.80, 660,164.92 and 321,864.64

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Solution

The fourth proportional to 439,888.80, 660,164.92 and 321,864.64 is: 483,039.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,888.80 : 660,164.92 = 321,864.64 : x
  2. Step 2: Convert to fraction form
    439,888.80/660,164.92 = 321,864.64/x
  3. Step 3: Cross multiply
    439,888.80x = 660,164.92 × 321,864.64
  4. Step 4: Simplify right side
    439,888.80x = 212,483,744,316.43
  5. Step 5: Solve for x
    x = 212,483,744,316.43/439,888.80
  6. Step 6: Final answer
    x = 483,039.68

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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.