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Finding the Fourth Proportional to 381,418.74, 526,331.52 and 211,639.50

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Solution

The fourth proportional to 381,418.74, 526,331.52 and 211,639.50 is: 292,047.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,418.74 : 526,331.52 = 211,639.50 : x
  2. Step 2: Convert to fraction form
    381,418.74/526,331.52 = 211,639.50/x
  3. Step 3: Cross multiply
    381,418.74x = 526,331.52 × 211,639.50
  4. Step 4: Simplify right side
    381,418.74x = 111,392,539,727.04
  5. Step 5: Solve for x
    x = 111,392,539,727.04/381,418.74
  6. Step 6: Final answer
    x = 292,047.89

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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.