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Finding the Fourth Proportional to 611,803.80, 917,705.70 and 399,227.40

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Solution

The fourth proportional to 611,803.80, 917,705.70 and 399,227.40 is: 598,841.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,803.80 : 917,705.70 = 399,227.40 : x
  2. Step 2: Convert to fraction form
    611,803.80/917,705.70 = 399,227.40/x
  3. Step 3: Cross multiply
    611,803.80x = 917,705.70 × 399,227.40
  4. Step 4: Simplify right side
    611,803.80x = 366,373,260,576.18
  5. Step 5: Solve for x
    x = 366,373,260,576.18/611,803.80
  6. Step 6: Final answer
    x = 598,841.10

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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.