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Finding the Fourth Proportional to 519,420.39, 716,836.33 and 290,022.78

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Solution

The fourth proportional to 519,420.39, 716,836.33 and 290,022.78 is: 400,251.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,420.39 : 716,836.33 = 290,022.78 : x
  2. Step 2: Convert to fraction form
    519,420.39/716,836.33 = 290,022.78/x
  3. Step 3: Cross multiply
    519,420.39x = 716,836.33 × 290,022.78
  4. Step 4: Simplify right side
    519,420.39x = 207,898,865,231.60
  5. Step 5: Solve for x
    x = 207,898,865,231.60/519,420.39
  6. Step 6: Final answer
    x = 400,251.64

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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.