Home / 457,789.70-686,881.38-221,310.20

Finding the Fourth Proportional to 457,789.70, 686,881.38 and 221,310.20

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Solution

The fourth proportional to 457,789.70, 686,881.38 and 221,310.20 is: 332,060.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,789.70 : 686,881.38 = 221,310.20 : x
  2. Step 2: Convert to fraction form
    457,789.70/686,881.38 = 221,310.20/x
  3. Step 3: Cross multiply
    457,789.70x = 686,881.38 × 221,310.20
  4. Step 4: Simplify right side
    457,789.70x = 152,013,855,584.08
  5. Step 5: Solve for x
    x = 152,013,855,584.08/457,789.70
  6. Step 6: Final answer
    x = 332,060.45

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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.