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Finding the Fourth Proportional to 611,709.10, 917,563.65 and 399,132.70

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Solution

The fourth proportional to 611,709.10, 917,563.65 and 399,132.70 is: 598,699.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,709.10 : 917,563.65 = 399,132.70 : x
  2. Step 2: Convert to fraction form
    611,709.10/917,563.65 = 399,132.70/x
  3. Step 3: Cross multiply
    611,709.10x = 917,563.65 × 399,132.70
  4. Step 4: Simplify right side
    611,709.10x = 366,229,657,046.36
  5. Step 5: Solve for x
    x = 366,229,657,046.36/611,709.10
  6. Step 6: Final answer
    x = 598,699.05

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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.