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Finding the Fourth Proportional to 388,820.25, 536,571.95 and 209,972.25

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Solution

The fourth proportional to 388,820.25, 536,571.95 and 209,972.25 is: 289,761.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,820.25 : 536,571.95 = 209,972.25 : x
  2. Step 2: Convert to fraction form
    388,820.25/536,571.95 = 209,972.25/x
  3. Step 3: Cross multiply
    388,820.25x = 536,571.95 × 209,972.25
  4. Step 4: Simplify right side
    388,820.25x = 112,665,218,578.53
  5. Step 5: Solve for x
    x = 112,665,218,578.53/388,820.25
  6. Step 6: Final answer
    x = 289,761.71

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1.5x scale

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.