Home / 763,105.20-1,145,176.20-426,145.20

Finding the Fourth Proportional to 763,105.20, 1,145,176.20 and 426,145.20

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Solution

The fourth proportional to 763,105.20, 1,145,176.20 and 426,145.20 is: 639,507.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,105.20 : 1,145,176.20 = 426,145.20 : x
  2. Step 2: Convert to fraction form
    763,105.20/1,145,176.20 = 426,145.20/x
  3. Step 3: Cross multiply
    763,105.20x = 1,145,176.20 × 426,145.20
  4. Step 4: Simplify right side
    763,105.20x = 488,011,340,784.24
  5. Step 5: Solve for x
    x = 488,011,340,784.24/763,105.20
  6. Step 6: Final answer
    x = 639,507.29

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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.