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Finding the Fourth Proportional to 274,165.45, 378,443.60 and 188,408.40

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Solution

The fourth proportional to 274,165.45, 378,443.60 and 188,408.40 is: 260,069.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    274,165.45 : 378,443.60 = 188,408.40 : x
  2. Step 2: Convert to fraction form
    274,165.45/378,443.60 = 188,408.40/x
  3. Step 3: Cross multiply
    274,165.45x = 378,443.60 × 188,408.40
  4. Step 4: Simplify right side
    274,165.45x = 71,301,953,166.24
  5. Step 5: Solve for x
    x = 71,301,953,166.24/274,165.45
  6. Step 6: Final answer
    x = 260,069.07

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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.