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Finding the Fourth Proportional to 310,378,879.44, 465,579,317.28 and 77,210,805.12

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Solution

The fourth proportional to 310,378,879.44, 465,579,317.28 and 77,210,805.12 is: 115,818,943.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,378,879.44 : 465,579,317.28 = 77,210,805.12 : x
  2. Step 2: Convert to fraction form
    310,378,879.44/465,579,317.28 = 77,210,805.12/x
  3. Step 3: Cross multiply
    310,378,879.44x = 465,579,317.28 × 77,210,805.12
  4. Step 4: Simplify right side
    310,378,879.44x = 35,947,753,934,408,728
  5. Step 5: Solve for x
    x = 35,947,753,934,408,728/310,378,879.44
  6. Step 6: Final answer
    x = 115,818,943.61

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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.