Home / 811,722.78-1,120,018.19-449,078.90

Finding the Fourth Proportional to 811,722.78, 1,120,018.19 and 449,078.90

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Solution

The fourth proportional to 811,722.78, 1,120,018.19 and 449,078.90 is: 619,640.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,722.78 : 1,120,018.19 = 449,078.90 : x
  2. Step 2: Convert to fraction form
    811,722.78/1,120,018.19 = 449,078.90/x
  3. Step 3: Cross multiply
    811,722.78x = 1,120,018.19 × 449,078.90
  4. Step 4: Simplify right side
    811,722.78x = 502,976,528,899.71
  5. Step 5: Solve for x
    x = 502,976,528,899.71/811,722.78
  6. Step 6: Final answer
    x = 619,640.77

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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.