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Finding the Fourth Proportional to 347,908.80, 521,474.40 and 198,220.80

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Solution

The fourth proportional to 347,908.80, 521,474.40 and 198,220.80 is: 297,109.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    347,908.80 : 521,474.40 = 198,220.80 : x
  2. Step 2: Convert to fraction form
    347,908.80/521,474.40 = 198,220.80/x
  3. Step 3: Cross multiply
    347,908.80x = 521,474.40 × 198,220.80
  4. Step 4: Simplify right side
    347,908.80x = 103,367,072,747.52
  5. Step 5: Solve for x
    x = 103,367,072,747.52/347,908.80
  6. Step 6: Final answer
    x = 297,109.68

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1.5x scale

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.