Home / 457,821.20-686,537.40-221,236.40

Finding the Fourth Proportional to 457,821.20, 686,537.40 and 221,236.40

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Solution

The fourth proportional to 457,821.20, 686,537.40 and 221,236.40 is: 331,760.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,821.20 : 686,537.40 = 221,236.40 : x
  2. Step 2: Convert to fraction form
    457,821.20/686,537.40 = 221,236.40/x
  3. Step 3: Cross multiply
    457,821.20x = 686,537.40 × 221,236.40
  4. Step 4: Simplify right side
    457,821.20x = 151,887,062,841.36
  5. Step 5: Solve for x
    x = 151,887,062,841.36/457,821.20
  6. Step 6: Final answer
    x = 331,760.66

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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.