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Finding the Fourth Proportional to 638,355.13, 957,672.86 and 189,111.17

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Solution

The fourth proportional to 638,355.13, 957,672.86 and 189,111.17 is: 283,708.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,355.13 : 957,672.86 = 189,111.17 : x
  2. Step 2: Convert to fraction form
    638,355.13/957,672.86 = 189,111.17/x
  3. Step 3: Cross multiply
    638,355.13x = 957,672.86 × 189,111.17
  4. Step 4: Simplify right side
    638,355.13x = 181,106,636,480.47
  5. Step 5: Solve for x
    x = 181,106,636,480.47/638,355.13
  6. Step 6: Final answer
    x = 283,708.28

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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.