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Finding the Fourth Proportional to 579,736.80, 869,691.60 and 205,728.48

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Solution

The fourth proportional to 579,736.80, 869,691.60 and 205,728.48 is: 308,623.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,736.80 : 869,691.60 = 205,728.48 : x
  2. Step 2: Convert to fraction form
    579,736.80/869,691.60 = 205,728.48/x
  3. Step 3: Cross multiply
    579,736.80x = 869,691.60 × 205,728.48
  4. Step 4: Simplify right side
    579,736.80x = 178,920,330,936.77
  5. Step 5: Solve for x
    x = 178,920,330,936.77/579,736.80
  6. Step 6: Final answer
    x = 308,623.38

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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.