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Finding the Fourth Proportional to 439,940.60, 660,712.80 and 384,828.20

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Solution

The fourth proportional to 439,940.60, 660,712.80 and 384,828.20 is: 577,943.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,940.60 : 660,712.80 = 384,828.20 : x
  2. Step 2: Convert to fraction form
    439,940.60/660,712.80 = 384,828.20/x
  3. Step 3: Cross multiply
    439,940.60x = 660,712.80 × 384,828.20
  4. Step 4: Simplify right side
    439,940.60x = 254,260,917,540.96
  5. Step 5: Solve for x
    x = 254,260,917,540.96/439,940.60
  6. Step 6: Final answer
    x = 577,943.74

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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.