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Finding the Fourth Proportional to 388,855.40, 536,620.34 and 210,007.40

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Solution

The fourth proportional to 388,855.40, 536,620.34 and 210,007.40 is: 289,810.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,855.40 : 536,620.34 = 210,007.40 : x
  2. Step 2: Convert to fraction form
    388,855.40/536,620.34 = 210,007.40/x
  3. Step 3: Cross multiply
    388,855.40x = 536,620.34 × 210,007.40
  4. Step 4: Simplify right side
    388,855.40x = 112,694,242,390.52
  5. Step 5: Solve for x
    x = 112,694,242,390.52/388,855.40
  6. Step 6: Final answer
    x = 289,810.15

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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.