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Finding the Fourth Proportional to 388,953, 536,755.14 and 210,105

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Solution

The fourth proportional to 388,953, 536,755.14 and 210,105 is: 289,944.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,953 : 536,755.14 = 210,105 : x
  2. Step 2: Convert to fraction form
    388,953/536,755.14 = 210,105/x
  3. Step 3: Cross multiply
    388,953x = 536,755.14 × 210,105
  4. Step 4: Simplify right side
    388,953x = 112,774,938,689.70
  5. Step 5: Solve for x
    x = 112,774,938,689.70/388,953
  6. Step 6: Final answer
    x = 289,944.90

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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.