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Finding the Fourth Proportional to 439,889.80, 660,166.42 and 321,865.64

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Solution

The fourth proportional to 439,889.80, 660,166.42 and 321,865.64 is: 483,041.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,889.80 : 660,166.42 = 321,865.64 : x
  2. Step 2: Convert to fraction form
    439,889.80/660,166.42 = 321,865.64/x
  3. Step 3: Cross multiply
    439,889.80x = 660,166.42 × 321,865.64
  4. Step 4: Simplify right side
    439,889.80x = 212,484,887,279.81
  5. Step 5: Solve for x
    x = 212,484,887,279.81/439,889.80
  6. Step 6: Final answer
    x = 483,041.18

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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.