Home / 427,621.90-640,920.95-199,610.75

Finding the Fourth Proportional to 427,621.90, 640,920.95 and 199,610.75

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Solution

The fourth proportional to 427,621.90, 640,920.95 and 199,610.75 is: 299,177.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,621.90 : 640,920.95 = 199,610.75 : x
  2. Step 2: Convert to fraction form
    427,621.90/640,920.95 = 199,610.75/x
  3. Step 3: Cross multiply
    427,621.90x = 640,920.95 × 199,610.75
  4. Step 4: Simplify right side
    427,621.90x = 127,934,708,814.64
  5. Step 5: Solve for x
    x = 127,934,708,814.64/427,621.90
  6. Step 6: Final answer
    x = 299,177.17

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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.