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Finding the Fourth Proportional to 639,308.72, 959,129.16 and 525,643.88

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Solution

The fourth proportional to 639,308.72, 959,129.16 and 525,643.88 is: 788,602.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,308.72 : 959,129.16 = 525,643.88 : x
  2. Step 2: Convert to fraction form
    639,308.72/959,129.16 = 525,643.88/x
  3. Step 3: Cross multiply
    639,308.72x = 959,129.16 × 525,643.88
  4. Step 4: Simplify right side
    639,308.72x = 504,160,373,083.54
  5. Step 5: Solve for x
    x = 504,160,373,083.54/639,308.72
  6. Step 6: Final answer
    x = 788,602.37

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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.