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Finding the Fourth Proportional to 520,793.24, 781,053.16 and 221,119.56

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Solution

The fourth proportional to 520,793.24, 781,053.16 and 221,119.56 is: 331,621.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,793.24 : 781,053.16 = 221,119.56 : x
  2. Step 2: Convert to fraction form
    520,793.24/781,053.16 = 221,119.56/x
  3. Step 3: Cross multiply
    520,793.24x = 781,053.16 × 221,119.56
  4. Step 4: Simplify right side
    520,793.24x = 172,706,131,075.81
  5. Step 5: Solve for x
    x = 172,706,131,075.81/520,793.24
  6. Step 6: Final answer
    x = 331,621.30

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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.