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Finding the Fourth Proportional to 381,420.77, 526,385.27 and 211,654.90

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Solution

The fourth proportional to 381,420.77, 526,385.27 and 211,654.90 is: 292,097.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,420.77 : 526,385.27 = 211,654.90 : x
  2. Step 2: Convert to fraction form
    381,420.77/526,385.27 = 211,654.90/x
  3. Step 3: Cross multiply
    381,420.77x = 526,385.27 × 211,654.90
  4. Step 4: Simplify right side
    381,420.77x = 111,412,020,896.50
  5. Step 5: Solve for x
    x = 111,412,020,896.50/381,420.77
  6. Step 6: Final answer
    x = 292,097.41

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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.