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Finding the Fourth Proportional to 379,042.66, 523,078.74 and 217,929.22

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Solution

The fourth proportional to 379,042.66, 523,078.74 and 217,929.22 is: 300,742.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,042.66 : 523,078.74 = 217,929.22 : x
  2. Step 2: Convert to fraction form
    379,042.66/523,078.74 = 217,929.22/x
  3. Step 3: Cross multiply
    379,042.66x = 523,078.74 × 217,929.22
  4. Step 4: Simplify right side
    379,042.66x = 113,994,141,806.78
  5. Step 5: Solve for x
    x = 113,994,141,806.78/379,042.66
  6. Step 6: Final answer
    x = 300,742.25

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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.