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Finding the Fourth Proportional to 520,404.84, 780,721.97 and 221,141.22

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Solution

The fourth proportional to 520,404.84, 780,721.97 and 221,141.22 is: 331,760.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,404.84 : 780,721.97 = 221,141.22 : x
  2. Step 2: Convert to fraction form
    520,404.84/780,721.97 = 221,141.22/x
  3. Step 3: Cross multiply
    520,404.84x = 780,721.97 × 221,141.22
  4. Step 4: Simplify right side
    520,404.84x = 172,649,807,820.90
  5. Step 5: Solve for x
    x = 172,649,807,820.90/520,404.84
  6. Step 6: Final answer
    x = 331,760.57

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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.