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Finding the Fourth Proportional to 687,902.40, 949,332.62 and 397,504.34

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Solution

The fourth proportional to 687,902.40, 949,332.62 and 397,504.34 is: 548,571.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,902.40 : 949,332.62 = 397,504.34 : x
  2. Step 2: Convert to fraction form
    687,902.40/949,332.62 = 397,504.34/x
  3. Step 3: Cross multiply
    687,902.40x = 949,332.62 × 397,504.34
  4. Step 4: Simplify right side
    687,902.40x = 377,363,832,013.70
  5. Step 5: Solve for x
    x = 377,363,832,013.70/687,902.40
  6. Step 6: Final answer
    x = 548,571.76

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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.