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Finding the Fourth Proportional to 415,007.70, 622,511.55 and 379,578.30

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Solution

The fourth proportional to 415,007.70, 622,511.55 and 379,578.30 is: 569,367.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,007.70 : 622,511.55 = 379,578.30 : x
  2. Step 2: Convert to fraction form
    415,007.70/622,511.55 = 379,578.30/x
  3. Step 3: Cross multiply
    415,007.70x = 622,511.55 × 379,578.30
  4. Step 4: Simplify right side
    415,007.70x = 236,291,875,879.37
  5. Step 5: Solve for x
    x = 236,291,875,879.37/415,007.70
  6. Step 6: Final answer
    x = 569,367.45

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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.