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Finding the Fourth Proportional to 381,221.51, 526,148.80 and 211,510.31

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Solution

The fourth proportional to 381,221.51, 526,148.80 and 211,510.31 is: 291,919.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,221.51 : 526,148.80 = 211,510.31 : x
  2. Step 2: Convert to fraction form
    381,221.51/526,148.80 = 211,510.31/x
  3. Step 3: Cross multiply
    381,221.51x = 526,148.80 × 211,510.31
  4. Step 4: Simplify right side
    381,221.51x = 111,285,892,634.61
  5. Step 5: Solve for x
    x = 111,285,892,634.61/381,221.51
  6. Step 6: Final answer
    x = 291,919.24

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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.