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Finding the Fourth Proportional to 381,870.95, 526,998.30 and 212,105.07

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Solution

The fourth proportional to 381,870.95, 526,998.30 and 212,105.07 is: 292,714.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,870.95 : 526,998.30 = 212,105.07 : x
  2. Step 2: Convert to fraction form
    381,870.95/526,998.30 = 212,105.07/x
  3. Step 3: Cross multiply
    381,870.95x = 526,998.30 × 212,105.07
  4. Step 4: Simplify right side
    381,870.95x = 111,779,011,311.38
  5. Step 5: Solve for x
    x = 111,779,011,311.38/381,870.95
  6. Step 6: Final answer
    x = 292,714.10

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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.