Home / 439,629.20-660,221.40-340,031.60

Finding the Fourth Proportional to 439,629.20, 660,221.40 and 340,031.60

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Solution

The fourth proportional to 439,629.20, 660,221.40 and 340,031.60 is: 510,648.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,629.20 : 660,221.40 = 340,031.60 : x
  2. Step 2: Convert to fraction form
    439,629.20/660,221.40 = 340,031.60/x
  3. Step 3: Cross multiply
    439,629.20x = 660,221.40 × 340,031.60
  4. Step 4: Simplify right side
    439,629.20x = 224,496,138,996.24
  5. Step 5: Solve for x
    x = 224,496,138,996.24/439,629.20
  6. Step 6: Final answer
    x = 510,648.84

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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.