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Finding the Fourth Proportional to 274,208.78, 378,405.45 and 153,348.68

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Solution

The fourth proportional to 274,208.78, 378,405.45 and 153,348.68 is: 211,619.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,208.78 : 378,405.45 = 153,348.68 : x
  2. Step 2: Convert to fraction form
    274,208.78/378,405.45 = 153,348.68/x
  3. Step 3: Cross multiply
    274,208.78x = 378,405.45 × 153,348.68
  4. Step 4: Simplify right side
    274,208.78x = 58,027,974,370.28
  5. Step 5: Solve for x
    x = 58,027,974,370.28/274,208.78
  6. Step 6: Final answer
    x = 211,619.68

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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.