Home / 763,102.20-1,145,171.70-426,142.20

Finding the Fourth Proportional to 763,102.20, 1,145,171.70 and 426,142.20

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Solution

The fourth proportional to 763,102.20, 1,145,171.70 and 426,142.20 is: 639,502.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    763,102.20 : 1,145,171.70 = 426,142.20 : x
  2. Step 2: Convert to fraction form
    763,102.20/1,145,171.70 = 426,142.20/x
  3. Step 3: Cross multiply
    763,102.20x = 1,145,171.70 × 426,142.20
  4. Step 4: Simplify right side
    763,102.20x = 488,005,987,615.74
  5. Step 5: Solve for x
    x = 488,005,987,615.74/763,102.20
  6. Step 6: Final answer
    x = 639,502.79

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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.