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Finding the Fourth Proportional to 577,813.60, 866,589.18 and 278,141.20

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Solution

The fourth proportional to 577,813.60, 866,589.18 and 278,141.20 is: 417,148.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,813.60 : 866,589.18 = 278,141.20 : x
  2. Step 2: Convert to fraction form
    577,813.60/866,589.18 = 278,141.20/x
  3. Step 3: Cross multiply
    577,813.60x = 866,589.18 × 278,141.20
  4. Step 4: Simplify right side
    577,813.60x = 241,034,154,432.22
  5. Step 5: Solve for x
    x = 241,034,154,432.22/577,813.60
  6. Step 6: Final answer
    x = 417,148.63

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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.