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Finding the Fourth Proportional to 253,133.80, 379,700.70 and 208,810.60

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Solution

The fourth proportional to 253,133.80, 379,700.70 and 208,810.60 is: 313,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,133.80 : 379,700.70 = 208,810.60 : x
  2. Step 2: Convert to fraction form
    253,133.80/379,700.70 = 208,810.60/x
  3. Step 3: Cross multiply
    253,133.80x = 379,700.70 × 208,810.60
  4. Step 4: Simplify right side
    253,133.80x = 79,285,530,987.42
  5. Step 5: Solve for x
    x = 79,285,530,987.42/253,133.80
  6. Step 6: Final answer
    x = 313,215.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.