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Finding the Fourth Proportional to 521,251.84, 781,555.20 and 354,534.40

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Solution

The fourth proportional to 521,251.84, 781,555.20 and 354,534.40 is: 531,582.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,251.84 : 781,555.20 = 354,534.40 : x
  2. Step 2: Convert to fraction form
    521,251.84/781,555.20 = 354,534.40/x
  3. Step 3: Cross multiply
    521,251.84x = 781,555.20 × 354,534.40
  4. Step 4: Simplify right side
    521,251.84x = 277,088,203,898.88
  5. Step 5: Solve for x
    x = 277,088,203,898.88/521,251.84
  6. Step 6: Final answer
    x = 531,582.21

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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.