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Finding the Fourth Proportional to 709,164.51, 978,649.38 and 386,881.41

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Solution

The fourth proportional to 709,164.51, 978,649.38 and 386,881.41 is: 533,897.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,164.51 : 978,649.38 = 386,881.41 : x
  2. Step 2: Convert to fraction form
    709,164.51/978,649.38 = 386,881.41/x
  3. Step 3: Cross multiply
    709,164.51x = 978,649.38 × 386,881.41
  4. Step 4: Simplify right side
    709,164.51x = 378,621,250,095.62
  5. Step 5: Solve for x
    x = 378,621,250,095.62/709,164.51
  6. Step 6: Final answer
    x = 533,897.63

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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.