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Finding the Fourth Proportional to 381,430.98, 526,399.38 and 211,665.09

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Solution

The fourth proportional to 381,430.98, 526,399.38 and 211,665.09 is: 292,111.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,430.98 : 526,399.38 = 211,665.09 : x
  2. Step 2: Convert to fraction form
    381,430.98/526,399.38 = 211,665.09/x
  3. Step 3: Cross multiply
    381,430.98x = 526,399.38 × 211,665.09
  4. Step 4: Simplify right side
    381,430.98x = 111,420,372,143.64
  5. Step 5: Solve for x
    x = 111,420,372,143.64/381,430.98
  6. Step 6: Final answer
    x = 292,111.49

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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.