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Finding the Fourth Proportional to 388,855.90, 536,621.03 and 210,007.90

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Solution

The fourth proportional to 388,855.90, 536,621.03 and 210,007.90 is: 289,810.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,855.90 : 536,621.03 = 210,007.90 : x
  2. Step 2: Convert to fraction form
    388,855.90/536,621.03 = 210,007.90/x
  3. Step 3: Cross multiply
    388,855.90x = 536,621.03 × 210,007.90
  4. Step 4: Simplify right side
    388,855.90x = 112,694,655,606.14
  5. Step 5: Solve for x
    x = 112,694,655,606.14/388,855.90
  6. Step 6: Final answer
    x = 289,810.84

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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.