Home / 1,420,981.92-1,960,141.68-911,109.60

Finding the Fourth Proportional to 1,420,981.92, 1,960,141.68 and 911,109.60

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Solution

The fourth proportional to 1,420,981.92, 1,960,141.68 and 911,109.60 is: 1,256,809.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420,981.92 : 1,960,141.68 = 911,109.60 : x
  2. Step 2: Convert to fraction form
    1,420,981.92/1,960,141.68 = 911,109.60/x
  3. Step 3: Cross multiply
    1,420,981.92x = 1,960,141.68 × 911,109.60
  4. Step 4: Simplify right side
    1,420,981.92x = 1,785,903,902,008.13
  5. Step 5: Solve for x
    x = 1,785,903,902,008.13/1,420,981.92
  6. Step 6: Final answer
    x = 1,256,809.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.