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Finding the Fourth Proportional to 388,897.75, 536,679.26 and 210,049.75

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Solution

The fourth proportional to 388,897.75, 536,679.26 and 210,049.75 is: 289,868.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,897.75 : 536,679.26 = 210,049.75 : x
  2. Step 2: Convert to fraction form
    388,897.75/536,679.26 = 210,049.75/x
  3. Step 3: Cross multiply
    388,897.75x = 536,679.26 × 210,049.75
  4. Step 4: Simplify right side
    388,897.75x = 112,729,344,393.19
  5. Step 5: Solve for x
    x = 112,729,344,393.19/388,897.75
  6. Step 6: Final answer
    x = 289,868.85

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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.