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Finding the Fourth Proportional to 381,191.06, 526,106.68 and 211,479.86

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Solution

The fourth proportional to 381,191.06, 526,106.68 and 211,479.86 is: 291,877.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,191.06 : 526,106.68 = 211,479.86 : x
  2. Step 2: Convert to fraction form
    381,191.06/526,106.68 = 211,479.86/x
  3. Step 3: Cross multiply
    381,191.06x = 526,106.68 × 211,479.86
  4. Step 4: Simplify right side
    381,191.06x = 111,260,967,031.47
  5. Step 5: Solve for x
    x = 111,260,967,031.47/381,191.06
  6. Step 6: Final answer
    x = 291,877.17

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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.