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Finding the Fourth Proportional to 639,907.88, 960,036.86 and 280,013.30

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Solution

The fourth proportional to 639,907.88, 960,036.86 and 280,013.30 is: 420,096.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,907.88 : 960,036.86 = 280,013.30 : x
  2. Step 2: Convert to fraction form
    639,907.88/960,036.86 = 280,013.30/x
  3. Step 3: Cross multiply
    639,907.88x = 960,036.86 × 280,013.30
  4. Step 4: Simplify right side
    639,907.88x = 268,823,089,290.24
  5. Step 5: Solve for x
    x = 268,823,089,290.24/639,907.88
  6. Step 6: Final answer
    x = 420,096.54

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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.