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Finding the Fourth Proportional to 274,258.47, 378,511.74 and 153,406.47

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Solution

The fourth proportional to 274,258.47, 378,511.74 and 153,406.47 is: 211,720.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,258.47 : 378,511.74 = 153,406.47 : x
  2. Step 2: Convert to fraction form
    274,258.47/378,511.74 = 153,406.47/x
  3. Step 3: Cross multiply
    274,258.47x = 378,511.74 × 153,406.47
  4. Step 4: Simplify right side
    274,258.47x = 58,066,149,886.96
  5. Step 5: Solve for x
    x = 58,066,149,886.96/274,258.47
  6. Step 6: Final answer
    x = 211,720.53

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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.