Home / 515,760.20-773,640.30-427,113.80

Finding the Fourth Proportional to 515,760.20, 773,640.30 and 427,113.80

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Solution

The fourth proportional to 515,760.20, 773,640.30 and 427,113.80 is: 640,670.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,760.20 : 773,640.30 = 427,113.80 : x
  2. Step 2: Convert to fraction form
    515,760.20/773,640.30 = 427,113.80/x
  3. Step 3: Cross multiply
    515,760.20x = 773,640.30 × 427,113.80
  4. Step 4: Simplify right side
    515,760.20x = 330,432,448,366.14
  5. Step 5: Solve for x
    x = 330,432,448,366.14/515,760.20
  6. Step 6: Final answer
    x = 640,670.70

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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.