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Finding the Fourth Proportional to 613,879.20, 920,637.36 and 276,725.28

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Solution

The fourth proportional to 613,879.20, 920,637.36 and 276,725.28 is: 415,006.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,879.20 : 920,637.36 = 276,725.28 : x
  2. Step 2: Convert to fraction form
    613,879.20/920,637.36 = 276,725.28/x
  3. Step 3: Cross multiply
    613,879.20x = 920,637.36 × 276,725.28
  4. Step 4: Simplify right side
    613,879.20x = 254,763,631,224.46
  5. Step 5: Solve for x
    x = 254,763,631,224.46/613,879.20
  6. Step 6: Final answer
    x = 415,006.13

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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.