Home / 426,828.11-640,311.64-199,351.20

Finding the Fourth Proportional to 426,828.11, 640,311.64 and 199,351.20

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Solution

The fourth proportional to 426,828.11, 640,311.64 and 199,351.20 is: 299,059.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,828.11 : 640,311.64 = 199,351.20 : x
  2. Step 2: Convert to fraction form
    426,828.11/640,311.64 = 199,351.20/x
  3. Step 3: Cross multiply
    426,828.11x = 640,311.64 × 199,351.20
  4. Step 4: Simplify right side
    426,828.11x = 127,646,893,807.97
  5. Step 5: Solve for x
    x = 127,646,893,807.97/426,828.11
  6. Step 6: Final answer
    x = 299,059.25

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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.