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Finding the Fourth Proportional to 378,535.30, 522,410.11 and 217,421.44

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Solution

The fourth proportional to 378,535.30, 522,410.11 and 217,421.44 is: 300,059.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,535.30 : 522,410.11 = 217,421.44 : x
  2. Step 2: Convert to fraction form
    378,535.30/522,410.11 = 217,421.44/x
  3. Step 3: Cross multiply
    378,535.30x = 522,410.11 × 217,421.44
  4. Step 4: Simplify right side
    378,535.30x = 113,583,158,386.76
  5. Step 5: Solve for x
    x = 113,583,158,386.76/378,535.30
  6. Step 6: Final answer
    x = 300,059.62

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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.