Home / 520,812.23-781,081.62-221,138.55

Finding the Fourth Proportional to 520,812.23, 781,081.62 and 221,138.55

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Solution

The fourth proportional to 520,812.23, 781,081.62 and 221,138.55 is: 331,649.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,812.23 : 781,081.62 = 221,138.55 : x
  2. Step 2: Convert to fraction form
    520,812.23/781,081.62 = 221,138.55/x
  3. Step 3: Cross multiply
    520,812.23x = 781,081.62 × 221,138.55
  4. Step 4: Simplify right side
    520,812.23x = 172,727,256,878.45
  5. Step 5: Solve for x
    x = 172,727,256,878.45/520,812.23
  6. Step 6: Final answer
    x = 331,649.77

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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.