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Finding the Fourth Proportional to 445,079.70, 613,874.97 and 309,113.91

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Solution

The fourth proportional to 445,079.70, 613,874.97 and 309,113.91 is: 426,344.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,079.70 : 613,874.97 = 309,113.91 : x
  2. Step 2: Convert to fraction form
    445,079.70/613,874.97 = 309,113.91/x
  3. Step 3: Cross multiply
    445,079.70x = 613,874.97 × 309,113.91
  4. Step 4: Simplify right side
    445,079.70x = 189,757,292,227.83
  5. Step 5: Solve for x
    x = 189,757,292,227.83/445,079.70
  6. Step 6: Final answer
    x = 426,344.52

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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.