Home / 639,905.88-960,033.86-280,011.30

Finding the Fourth Proportional to 639,905.88, 960,033.86 and 280,011.30

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Solution

The fourth proportional to 639,905.88, 960,033.86 and 280,011.30 is: 420,093.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,905.88 : 960,033.86 = 280,011.30 : x
  2. Step 2: Convert to fraction form
    639,905.88/960,033.86 = 280,011.30/x
  3. Step 3: Cross multiply
    639,905.88x = 960,033.86 × 280,011.30
  4. Step 4: Simplify right side
    639,905.88x = 268,820,329,182.62
  5. Step 5: Solve for x
    x = 268,820,329,182.62/639,905.88
  6. Step 6: Final answer
    x = 420,093.54

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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.