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Finding the Fourth Proportional to 407,079.37, 561,401.85 and 254,131.71

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Solution

The fourth proportional to 407,079.37, 561,401.85 and 254,131.71 is: 350,472.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,079.37 : 561,401.85 = 254,131.71 : x
  2. Step 2: Convert to fraction form
    407,079.37/561,401.85 = 254,131.71/x
  3. Step 3: Cross multiply
    407,079.37x = 561,401.85 × 254,131.71
  4. Step 4: Simplify right side
    407,079.37x = 142,670,012,137.66
  5. Step 5: Solve for x
    x = 142,670,012,137.66/407,079.37
  6. Step 6: Final answer
    x = 350,472.22

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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.