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Finding the Fourth Proportional to 639,309.72, 959,130.66 and 525,644.88

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Solution

The fourth proportional to 639,309.72, 959,130.66 and 525,644.88 is: 788,603.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,309.72 : 959,130.66 = 525,644.88 : x
  2. Step 2: Convert to fraction form
    639,309.72/959,130.66 = 525,644.88/x
  3. Step 3: Cross multiply
    639,309.72x = 959,130.66 × 525,644.88
  4. Step 4: Simplify right side
    639,309.72x = 504,162,120,680.02
  5. Step 5: Solve for x
    x = 504,162,120,680.02/639,309.72
  6. Step 6: Final answer
    x = 788,603.87

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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.