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Finding the Fourth Proportional to 378,789.04, 522,711.12 and 217,530.40

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Solution

The fourth proportional to 378,789.04, 522,711.12 and 217,530.40 is: 300,181.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,789.04 : 522,711.12 = 217,530.40 : x
  2. Step 2: Convert to fraction form
    378,789.04/522,711.12 = 217,530.40/x
  3. Step 3: Cross multiply
    378,789.04x = 522,711.12 × 217,530.40
  4. Step 4: Simplify right side
    378,789.04x = 113,705,559,018.05
  5. Step 5: Solve for x
    x = 113,705,559,018.05/378,789.04
  6. Step 6: Final answer
    x = 300,181.76

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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.