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Finding the Fourth Proportional to 698,469.95, 963,875.49 and 388,391.42

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Solution

The fourth proportional to 698,469.95, 963,875.49 and 388,391.42 is: 535,972.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    698,469.95 : 963,875.49 = 388,391.42 : x
  2. Step 2: Convert to fraction form
    698,469.95/963,875.49 = 388,391.42/x
  3. Step 3: Cross multiply
    698,469.95x = 963,875.49 × 388,391.42
  4. Step 4: Simplify right side
    698,469.95x = 374,360,970,264.30
  5. Step 5: Solve for x
    x = 374,360,970,264.30/698,469.95
  6. Step 6: Final answer
    x = 535,972.91

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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.