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Finding the Fourth Proportional to 426,961.56, 640,420.48 and 127,444.62

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Solution

The fourth proportional to 426,961.56, 640,420.48 and 127,444.62 is: 191,160.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,961.56 : 640,420.48 = 127,444.62 : x
  2. Step 2: Convert to fraction form
    426,961.56/640,420.48 = 127,444.62/x
  3. Step 3: Cross multiply
    426,961.56x = 640,420.48 × 127,444.62
  4. Step 4: Simplify right side
    426,961.56x = 81,618,146,557.82
  5. Step 5: Solve for x
    x = 81,618,146,557.82/426,961.56
  6. Step 6: Final answer
    x = 191,160.41

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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.