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Finding the Fourth Proportional to 378,807.80, 522,844.20 and 217,756.28

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Solution

The fourth proportional to 378,807.80, 522,844.20 and 217,756.28 is: 300,555.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,807.80 : 522,844.20 = 217,756.28 : x
  2. Step 2: Convert to fraction form
    378,807.80/522,844.20 = 217,756.28/x
  3. Step 3: Cross multiply
    378,807.80x = 522,844.20 × 217,756.28
  4. Step 4: Simplify right side
    378,807.80x = 113,852,608,011.58
  5. Step 5: Solve for x
    x = 113,852,608,011.58/378,807.80
  6. Step 6: Final answer
    x = 300,555.08

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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.