Home / 378,911.32-522,897.66-209,145.49

Finding the Fourth Proportional to 378,911.32, 522,897.66 and 209,145.49

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Solution

The fourth proportional to 378,911.32, 522,897.66 and 209,145.49 is: 288,620.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,911.32 : 522,897.66 = 209,145.49 : x
  2. Step 2: Convert to fraction form
    378,911.32/522,897.66 = 209,145.49/x
  3. Step 3: Cross multiply
    378,911.32x = 522,897.66 × 209,145.49
  4. Step 4: Simplify right side
    378,911.32x = 109,361,684,706.07
  5. Step 5: Solve for x
    x = 109,361,684,706.07/378,911.32
  6. Step 6: Final answer
    x = 288,620.79

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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.