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Finding the Fourth Proportional to 611,793.10, 917,689.65 and 399,216.70

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Solution

The fourth proportional to 611,793.10, 917,689.65 and 399,216.70 is: 598,825.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,793.10 : 917,689.65 = 399,216.70 : x
  2. Step 2: Convert to fraction form
    611,793.10/917,689.65 = 399,216.70/x
  3. Step 3: Cross multiply
    611,793.10x = 917,689.65 × 399,216.70
  4. Step 4: Simplify right side
    611,793.10x = 366,357,033,697.16
  5. Step 5: Solve for x
    x = 366,357,033,697.16/611,793.10
  6. Step 6: Final answer
    x = 598,825.05

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Similar ratio
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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.