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Finding the Fourth Proportional to 698,470.95, 963,876.87 and 388,392.42

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Solution

The fourth proportional to 698,470.95, 963,876.87 and 388,392.42 is: 535,974.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,470.95 : 963,876.87 = 388,392.42 : x
  2. Step 2: Convert to fraction form
    698,470.95/963,876.87 = 388,392.42/x
  3. Step 3: Cross multiply
    698,470.95x = 963,876.87 × 388,392.42
  4. Step 4: Simplify right side
    698,470.95x = 374,362,470,121.33
  5. Step 5: Solve for x
    x = 374,362,470,121.33/698,470.95
  6. Step 6: Final answer
    x = 535,974.29

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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.