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Finding the Fourth Proportional to 522,057.45, 720,786.15 and 400,982.07

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Solution

The fourth proportional to 522,057.45, 720,786.15 and 400,982.07 is: 553,621.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,057.45 : 720,786.15 = 400,982.07 : x
  2. Step 2: Convert to fraction form
    522,057.45/720,786.15 = 400,982.07/x
  3. Step 3: Cross multiply
    522,057.45x = 720,786.15 × 400,982.07
  4. Step 4: Simplify right side
    522,057.45x = 289,022,322,454.33
  5. Step 5: Solve for x
    x = 289,022,322,454.33/522,057.45
  6. Step 6: Final answer
    x = 553,621.68

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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.