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Finding the Fourth Proportional to 698,502.88, 964,013.88 and 388,436.38

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Solution

The fourth proportional to 698,502.88, 964,013.88 and 388,436.38 is: 536,086.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,502.88 : 964,013.88 = 388,436.38 : x
  2. Step 2: Convert to fraction form
    698,502.88/964,013.88 = 388,436.38/x
  3. Step 3: Cross multiply
    698,502.88x = 964,013.88 × 388,436.38
  4. Step 4: Simplify right side
    698,502.88x = 374,458,061,816.95
  5. Step 5: Solve for x
    x = 374,458,061,816.95/698,502.88
  6. Step 6: Final answer
    x = 536,086.64

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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.