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Finding the Fourth Proportional to 313,469.48, 432,720.30 and 211,632.87

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Solution

The fourth proportional to 313,469.48, 432,720.30 and 211,632.87 is: 292,142.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,469.48 : 432,720.30 = 211,632.87 : x
  2. Step 2: Convert to fraction form
    313,469.48/432,720.30 = 211,632.87/x
  3. Step 3: Cross multiply
    313,469.48x = 432,720.30 × 211,632.87
  4. Step 4: Simplify right side
    313,469.48x = 91,577,839,410.80
  5. Step 5: Solve for x
    x = 91,577,839,410.80/313,469.48
  6. Step 6: Final answer
    x = 292,142.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.