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Finding the Fourth Proportional to 521,937.68, 783,152.55 and 389,077.43

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Solution

The fourth proportional to 521,937.68, 783,152.55 and 389,077.43 is: 583,799.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,937.68 : 783,152.55 = 389,077.43 : x
  2. Step 2: Convert to fraction form
    521,937.68/783,152.55 = 389,077.43/x
  3. Step 3: Cross multiply
    521,937.68x = 783,152.55 × 389,077.43
  4. Step 4: Simplify right side
    521,937.68x = 304,706,977,536.18
  5. Step 5: Solve for x
    x = 304,706,977,536.18/521,937.68
  6. Step 6: Final answer
    x = 583,799.55

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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.