Home / 427,236.18-640,982.73-127,726.50

Finding the Fourth Proportional to 427,236.18, 640,982.73 and 127,726.50

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Solution

The fourth proportional to 427,236.18, 640,982.73 and 127,726.50 is: 191,628.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,236.18 : 640,982.73 = 127,726.50 : x
  2. Step 2: Convert to fraction form
    427,236.18/640,982.73 = 127,726.50/x
  3. Step 3: Cross multiply
    427,236.18x = 640,982.73 × 127,726.50
  4. Step 4: Simplify right side
    427,236.18x = 81,870,480,663.35
  5. Step 5: Solve for x
    x = 81,870,480,663.35/427,236.18
  6. Step 6: Final answer
    x = 191,628.15

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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.