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Finding the Fourth Proportional to 427,260.48, 640,927.30 and 111,716.88

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Solution

The fourth proportional to 427,260.48, 640,927.30 and 111,716.88 is: 167,584.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,260.48 : 640,927.30 = 111,716.88 : x
  2. Step 2: Convert to fraction form
    427,260.48/640,927.30 = 111,716.88/x
  3. Step 3: Cross multiply
    427,260.48x = 640,927.30 × 111,716.88
  4. Step 4: Simplify right side
    427,260.48x = 71,602,398,262.82
  5. Step 5: Solve for x
    x = 71,602,398,262.82/427,260.48
  6. Step 6: Final answer
    x = 167,584.88

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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.