Home / 1,091,321.20-1,636,981.80-918,110.80

Finding the Fourth Proportional to 1,091,321.20, 1,636,981.80 and 918,110.80

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Solution

The fourth proportional to 1,091,321.20, 1,636,981.80 and 918,110.80 is: 1,377,166.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,091,321.20 : 1,636,981.80 = 918,110.80 : x
  2. Step 2: Convert to fraction form
    1,091,321.20/1,636,981.80 = 918,110.80/x
  3. Step 3: Cross multiply
    1,091,321.20x = 1,636,981.80 × 918,110.80
  4. Step 4: Simplify right side
    1,091,321.20x = 1,502,930,669,983.44
  5. Step 5: Solve for x
    x = 1,502,930,669,983.44/1,091,321.20
  6. Step 6: Final answer
    x = 1,377,166.20

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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.