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Finding the Fourth Proportional to 680,292.37, 938,489.39 and 438,652.56

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Solution

The fourth proportional to 680,292.37, 938,489.39 and 438,652.56 is: 605,138.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,292.37 : 938,489.39 = 438,652.56 : x
  2. Step 2: Convert to fraction form
    680,292.37/938,489.39 = 438,652.56/x
  3. Step 3: Cross multiply
    680,292.37x = 938,489.39 × 438,652.56
  4. Step 4: Simplify right side
    680,292.37x = 411,670,776,427.36
  5. Step 5: Solve for x
    x = 411,670,776,427.36/680,292.37
  6. Step 6: Final answer
    x = 605,138.02

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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.