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Finding the Fourth Proportional to 639,703.76, 959,887.73 and 260,902.40

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Solution

The fourth proportional to 639,703.76, 959,887.73 and 260,902.40 is: 391,489.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,703.76 : 959,887.73 = 260,902.40 : x
  2. Step 2: Convert to fraction form
    639,703.76/959,887.73 = 260,902.40/x
  3. Step 3: Cross multiply
    639,703.76x = 959,887.73 × 260,902.40
  4. Step 4: Simplify right side
    639,703.76x = 250,437,008,340.37
  5. Step 5: Solve for x
    x = 250,437,008,340.37/639,703.76
  6. Step 6: Final answer
    x = 391,489.04

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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.