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Finding the Fourth Proportional to 518,385.20, 777,461.15 and 185,961.20

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Solution

The fourth proportional to 518,385.20, 777,461.15 and 185,961.20 is: 278,899.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,385.20 : 777,461.15 = 185,961.20 : x
  2. Step 2: Convert to fraction form
    518,385.20/777,461.15 = 185,961.20/x
  3. Step 3: Cross multiply
    518,385.20x = 777,461.15 × 185,961.20
  4. Step 4: Simplify right side
    518,385.20x = 144,577,604,520.07
  5. Step 5: Solve for x
    x = 144,577,604,520.07/518,385.20
  6. Step 6: Final answer
    x = 278,899.95

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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.