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Finding the Fourth Proportional to 381,390.32, 526,330.50 and 211,640.24

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Solution

The fourth proportional to 381,390.32, 526,330.50 and 211,640.24 is: 292,070.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,390.32 : 526,330.50 = 211,640.24 : x
  2. Step 2: Convert to fraction form
    381,390.32/526,330.50 = 211,640.24/x
  3. Step 3: Cross multiply
    381,390.32x = 526,330.50 × 211,640.24
  4. Step 4: Simplify right side
    381,390.32x = 111,392,713,339.32
  5. Step 5: Solve for x
    x = 111,392,713,339.32/381,390.32
  6. Step 6: Final answer
    x = 292,070.11

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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.