Home / 763,121.20-1,145,200.20-426,161.20

Finding the Fourth Proportional to 763,121.20, 1,145,200.20 and 426,161.20

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Solution

The fourth proportional to 763,121.20, 1,145,200.20 and 426,161.20 is: 639,531.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,121.20 : 1,145,200.20 = 426,161.20 : x
  2. Step 2: Convert to fraction form
    763,121.20/1,145,200.20 = 426,161.20/x
  3. Step 3: Cross multiply
    763,121.20x = 1,145,200.20 × 426,161.20
  4. Step 4: Simplify right side
    763,121.20x = 488,039,891,472.24
  5. Step 5: Solve for x
    x = 488,039,891,472.24/763,121.20
  6. Step 6: Final answer
    x = 639,531.30

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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.