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Finding the Fourth Proportional to 378,673.20, 522,594.40 and 217,580.40

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Solution

The fourth proportional to 378,673.20, 522,594.40 and 217,580.40 is: 300,275.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,673.20 : 522,594.40 = 217,580.40 : x
  2. Step 2: Convert to fraction form
    378,673.20/522,594.40 = 217,580.40/x
  3. Step 3: Cross multiply
    378,673.20x = 522,594.40 × 217,580.40
  4. Step 4: Simplify right side
    378,673.20x = 113,706,298,589.76
  5. Step 5: Solve for x
    x = 113,706,298,589.76/378,673.20
  6. Step 6: Final answer
    x = 300,275.54

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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.