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Finding the Fourth Proportional to 698,469.45, 963,874.80 and 388,390.92

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Solution

The fourth proportional to 698,469.45, 963,874.80 and 388,390.92 is: 535,972.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,469.45 : 963,874.80 = 388,390.92 : x
  2. Step 2: Convert to fraction form
    698,469.45/963,874.80 = 388,390.92/x
  3. Step 3: Cross multiply
    698,469.45x = 963,874.80 × 388,390.92
  4. Step 4: Simplify right side
    698,469.45x = 374,360,220,336.82
  5. Step 5: Solve for x
    x = 374,360,220,336.82/698,469.45
  6. Step 6: Final answer
    x = 535,972.22

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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.