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Finding the Fourth Proportional to 885,978.60, 1,222,571.61 and 493,481.51

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Solution

The fourth proportional to 885,978.60, 1,222,571.61 and 493,481.51 is: 680,960.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,978.60 : 1,222,571.61 = 493,481.51 : x
  2. Step 2: Convert to fraction form
    885,978.60/1,222,571.61 = 493,481.51/x
  3. Step 3: Cross multiply
    885,978.60x = 1,222,571.61 × 493,481.51
  4. Step 4: Simplify right side
    885,978.60x = 603,316,491,616.58
  5. Step 5: Solve for x
    x = 603,316,491,616.58/885,978.60
  6. Step 6: Final answer
    x = 680,960.57

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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.