Home / 426,815.20-640,255.20-127,272.34

Finding the Fourth Proportional to 426,815.20, 640,255.20 and 127,272.34

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Solution

The fourth proportional to 426,815.20, 640,255.20 and 127,272.34 is: 190,918.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,815.20 : 640,255.20 = 127,272.34 : x
  2. Step 2: Convert to fraction form
    426,815.20/640,255.20 = 127,272.34/x
  3. Step 3: Cross multiply
    426,815.20x = 640,255.20 × 127,272.34
  4. Step 4: Simplify right side
    426,815.20x = 81,486,777,501.17
  5. Step 5: Solve for x
    x = 81,486,777,501.17/426,815.20
  6. Step 6: Final answer
    x = 190,918.17

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1.5x scale

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.