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Finding the Fourth Proportional to 520,918.20, 781,377.30 and 436,937.40

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Solution

The fourth proportional to 520,918.20, 781,377.30 and 436,937.40 is: 655,406.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,918.20 : 781,377.30 = 436,937.40 : x
  2. Step 2: Convert to fraction form
    520,918.20/781,377.30 = 436,937.40/x
  3. Step 3: Cross multiply
    520,918.20x = 781,377.30 × 436,937.40
  4. Step 4: Simplify right side
    520,918.20x = 341,412,965,881.02
  5. Step 5: Solve for x
    x = 341,412,965,881.02/520,918.20
  6. Step 6: Final answer
    x = 655,406.10

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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.