Home / 521,063.20-781,667.70-221,541.40

Finding the Fourth Proportional to 521,063.20, 781,667.70 and 221,541.40

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Solution

The fourth proportional to 521,063.20, 781,667.70 and 221,541.40 is: 332,343.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,063.20 : 781,667.70 = 221,541.40 : x
  2. Step 2: Convert to fraction form
    521,063.20/781,667.70 = 221,541.40/x
  3. Step 3: Cross multiply
    521,063.20x = 781,667.70 × 221,541.40
  4. Step 4: Simplify right side
    521,063.20x = 173,171,756,592.78
  5. Step 5: Solve for x
    x = 173,171,756,592.78/521,063.20
  6. Step 6: Final answer
    x = 332,343.10

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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.