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Finding the Fourth Proportional to 681,216.60, 940,008.33 and 419,530.50

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Solution

The fourth proportional to 681,216.60, 940,008.33 and 419,530.50 is: 578,908.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,216.60 : 940,008.33 = 419,530.50 : x
  2. Step 2: Convert to fraction form
    681,216.60/940,008.33 = 419,530.50/x
  3. Step 3: Cross multiply
    681,216.60x = 940,008.33 × 419,530.50
  4. Step 4: Simplify right side
    681,216.60x = 394,362,164,689.07
  5. Step 5: Solve for x
    x = 394,362,164,689.07/681,216.60
  6. Step 6: Final answer
    x = 578,908.62

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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.