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Finding the Fourth Proportional to 1,217,818.80, 1,826,728.20 and 657,946.80

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Solution

The fourth proportional to 1,217,818.80, 1,826,728.20 and 657,946.80 is: 986,920.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,818.80 : 1,826,728.20 = 657,946.80 : x
  2. Step 2: Convert to fraction form
    1,217,818.80/1,826,728.20 = 657,946.80/x
  3. Step 3: Cross multiply
    1,217,818.80x = 1,826,728.20 × 657,946.80
  4. Step 4: Simplify right side
    1,217,818.80x = 1,201,889,973,659.76
  5. Step 5: Solve for x
    x = 1,201,889,973,659.76/1,217,818.80
  6. Step 6: Final answer
    x = 986,920.20

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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.