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Finding the Fourth Proportional to 1,291,155, 1,937,043.54 and 404,691

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Solution

The fourth proportional to 1,291,155, 1,937,043.54 and 404,691 is: 607,133.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291,155 : 1,937,043.54 = 404,691 : x
  2. Step 2: Convert to fraction form
    1,291,155/1,937,043.54 = 404,691/x
  3. Step 3: Cross multiply
    1,291,155x = 1,937,043.54 × 404,691
  4. Step 4: Simplify right side
    1,291,155x = 783,904,087,246.14
  5. Step 5: Solve for x
    x = 783,904,087,246.14/1,291,155
  6. Step 6: Final answer
    x = 607,133.99

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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.