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Finding the Fourth Proportional to 568,120.05, 784,021.95 and 313,487.64

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Solution

The fourth proportional to 568,120.05, 784,021.95 and 313,487.64 is: 432,621.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,120.05 : 784,021.95 = 313,487.64 : x
  2. Step 2: Convert to fraction form
    568,120.05/784,021.95 = 313,487.64/x
  3. Step 3: Cross multiply
    568,120.05x = 784,021.95 × 313,487.64
  4. Step 4: Simplify right side
    568,120.05x = 245,781,190,813.70
  5. Step 5: Solve for x
    x = 245,781,190,813.70/568,120.05
  6. Step 6: Final answer
    x = 432,621.93

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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.