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Finding the Fourth Proportional to 427,234.68, 640,980.48 and 127,725

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Solution

The fourth proportional to 427,234.68, 640,980.48 and 127,725 is: 191,625.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,234.68 : 640,980.48 = 127,725 : x
  2. Step 2: Convert to fraction form
    427,234.68/640,980.48 = 127,725/x
  3. Step 3: Cross multiply
    427,234.68x = 640,980.48 × 127,725
  4. Step 4: Simplify right side
    427,234.68x = 81,869,231,808
  5. Step 5: Solve for x
    x = 81,869,231,808/427,234.68
  6. Step 6: Final answer
    x = 191,625.90

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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.