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Finding the Fourth Proportional to 274,873.70, 379,290.47 and 153,985.25

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Solution

The fourth proportional to 274,873.70, 379,290.47 and 153,985.25 is: 212,479.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,873.70 : 379,290.47 = 153,985.25 : x
  2. Step 2: Convert to fraction form
    274,873.70/379,290.47 = 153,985.25/x
  3. Step 3: Cross multiply
    274,873.70x = 379,290.47 × 153,985.25
  4. Step 4: Simplify right side
    274,873.70x = 58,405,138,023.87
  5. Step 5: Solve for x
    x = 58,405,138,023.87/274,873.70
  6. Step 6: Final answer
    x = 212,479.90

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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.