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Finding the Fourth Proportional to 388,600.20, 536,257.80 and 218,830.68

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Solution

The fourth proportional to 388,600.20, 536,257.80 and 218,830.68 is: 301,980.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,600.20 : 536,257.80 = 218,830.68 : x
  2. Step 2: Convert to fraction form
    388,600.20/536,257.80 = 218,830.68/x
  3. Step 3: Cross multiply
    388,600.20x = 536,257.80 × 218,830.68
  4. Step 4: Simplify right side
    388,600.20x = 117,349,659,029.30
  5. Step 5: Solve for x
    x = 117,349,659,029.30/388,600.20
  6. Step 6: Final answer
    x = 301,980.44

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1.5x scale

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.