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Finding the Fourth Proportional to 662,906.94, 914,768.46 and 390,912.45

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Solution

The fourth proportional to 662,906.94, 914,768.46 and 390,912.45 is: 539,433.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,906.94 : 914,768.46 = 390,912.45 : x
  2. Step 2: Convert to fraction form
    662,906.94/914,768.46 = 390,912.45/x
  3. Step 3: Cross multiply
    662,906.94x = 914,768.46 × 390,912.45
  4. Step 4: Simplify right side
    662,906.94x = 357,594,379,881.33
  5. Step 5: Solve for x
    x = 357,594,379,881.33/662,906.94
  6. Step 6: Final answer
    x = 539,433.76

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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.