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Finding the Fourth Proportional to 426,515.20, 640,003.20 and 177,222.40

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Solution

The fourth proportional to 426,515.20, 640,003.20 and 177,222.40 is: 265,929.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,515.20 : 640,003.20 = 177,222.40 : x
  2. Step 2: Convert to fraction form
    426,515.20/640,003.20 = 177,222.40/x
  3. Step 3: Cross multiply
    426,515.20x = 640,003.20 × 177,222.40
  4. Step 4: Simplify right side
    426,515.20x = 113,422,903,111.68
  5. Step 5: Solve for x
    x = 113,422,903,111.68/426,515.20
  6. Step 6: Final answer
    x = 265,929.33

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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.