Home / 378,540,900-522,387,164.93-208,995,465.69

Finding the Fourth Proportional to 378,540,900, 522,387,164.93 and 208,995,465.69

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Solution

The fourth proportional to 378,540,900, 522,387,164.93 and 208,995,465.69 is: 288,414,141.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,540,900 : 522,387,164.93 = 208,995,465.69 : x
  2. Step 2: Convert to fraction form
    378,540,900/522,387,164.93 = 208,995,465.69/x
  3. Step 3: Cross multiply
    378,540,900x = 522,387,164.93 × 208,995,465.69
  4. Step 4: Simplify right side
    378,540,900x = 109,176,548,803,979,216
  5. Step 5: Solve for x
    x = 109,176,548,803,979,216/378,540,900
  6. Step 6: Final answer
    x = 288,414,141.78

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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.