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Finding the Fourth Proportional to 639,188.62, 959,149.26 and 260,039.37

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Solution

The fourth proportional to 639,188.62, 959,149.26 and 260,039.37 is: 390,208.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,188.62 : 959,149.26 = 260,039.37 : x
  2. Step 2: Convert to fraction form
    639,188.62/959,149.26 = 260,039.37/x
  3. Step 3: Cross multiply
    639,188.62x = 959,149.26 × 260,039.37
  4. Step 4: Simplify right side
    639,188.62x = 249,416,564,510.62
  5. Step 5: Solve for x
    x = 249,416,564,510.62/639,188.62
  6. Step 6: Final answer
    x = 390,208.08

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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.