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Finding the Fourth Proportional to 274,078.84, 378,246.36 and 153,220.64

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Solution

The fourth proportional to 274,078.84, 378,246.36 and 153,220.64 is: 211,454.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,078.84 : 378,246.36 = 153,220.64 : x
  2. Step 2: Convert to fraction form
    274,078.84/378,246.36 = 153,220.64/x
  3. Step 3: Cross multiply
    274,078.84x = 378,246.36 × 153,220.64
  4. Step 4: Simplify right side
    274,078.84x = 57,955,149,356.87
  5. Step 5: Solve for x
    x = 57,955,149,356.87/274,078.84
  6. Step 6: Final answer
    x = 211,454.30

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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.