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Finding the Fourth Proportional to 388,866, 536,635.08 and 210,018

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Solution

The fourth proportional to 388,866, 536,635.08 and 210,018 is: 289,824.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,866 : 536,635.08 = 210,018 : x
  2. Step 2: Convert to fraction form
    388,866/536,635.08 = 210,018/x
  3. Step 3: Cross multiply
    388,866x = 536,635.08 × 210,018
  4. Step 4: Simplify right side
    388,866x = 112,703,026,231.44
  5. Step 5: Solve for x
    x = 112,703,026,231.44/388,866
  6. Step 6: Final answer
    x = 289,824.84

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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.