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Finding the Fourth Proportional to 621,193.80, 931,790.70 and 610,696.20

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Solution

The fourth proportional to 621,193.80, 931,790.70 and 610,696.20 is: 916,044.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,193.80 : 931,790.70 = 610,696.20 : x
  2. Step 2: Convert to fraction form
    621,193.80/931,790.70 = 610,696.20/x
  3. Step 3: Cross multiply
    621,193.80x = 931,790.70 × 610,696.20
  4. Step 4: Simplify right side
    621,193.80x = 569,041,039,685.34
  5. Step 5: Solve for x
    x = 569,041,039,685.34/621,193.80
  6. Step 6: Final answer
    x = 916,044.30

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Double scale
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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.