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Finding the Fourth Proportional to 1,200,664.79, 1,656,916.86 and 656,800.44

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Solution

The fourth proportional to 1,200,664.79, 1,656,916.86 and 656,800.44 is: 906,384.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,200,664.79 : 1,656,916.86 = 656,800.44 : x
  2. Step 2: Convert to fraction form
    1,200,664.79/1,656,916.86 = 656,800.44/x
  3. Step 3: Cross multiply
    1,200,664.79x = 1,656,916.86 × 656,800.44
  4. Step 4: Simplify right side
    1,200,664.79x = 1,088,263,720,814.42
  5. Step 5: Solve for x
    x = 1,088,263,720,814.42/1,200,664.79
  6. Step 6: Final answer
    x = 906,384.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.