Home / 520,811.47-781,080.50-221,137.79

Finding the Fourth Proportional to 520,811.47, 781,080.50 and 221,137.79

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Solution

The fourth proportional to 520,811.47, 781,080.50 and 221,137.79 is: 331,648.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,811.47 : 781,080.50 = 221,137.79 : x
  2. Step 2: Convert to fraction form
    520,811.47/781,080.50 = 221,137.79/x
  3. Step 3: Cross multiply
    520,811.47x = 781,080.50 × 221,137.79
  4. Step 4: Simplify right side
    520,811.47x = 172,726,418,087.64
  5. Step 5: Solve for x
    x = 172,726,418,087.64/520,811.47
  6. Step 6: Final answer
    x = 331,648.65

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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.