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Finding the Fourth Proportional to 2,836,978.02, 3,915,042.66 and 1,547,845.20

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Solution

The fourth proportional to 2,836,978.02, 3,915,042.66 and 1,547,845.20 is: 2,136,033.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,836,978.02 : 3,915,042.66 = 1,547,845.20 : x
  2. Step 2: Convert to fraction form
    2,836,978.02/3,915,042.66 = 1,547,845.20/x
  3. Step 3: Cross multiply
    2,836,978.02x = 3,915,042.66 × 1,547,845.20
  4. Step 4: Simplify right side
    2,836,978.02x = 6,059,879,989,076.23
  5. Step 5: Solve for x
    x = 6,059,879,989,076.23/2,836,978.02
  6. Step 6: Final answer
    x = 2,136,033.46

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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.