Home / 378,911.06-522,897.32-209,145.23

Finding the Fourth Proportional to 378,911.06, 522,897.32 and 209,145.23

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Solution

The fourth proportional to 378,911.06, 522,897.32 and 209,145.23 is: 288,620.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,911.06 : 522,897.32 = 209,145.23 : x
  2. Step 2: Convert to fraction form
    378,911.06/522,897.32 = 209,145.23/x
  3. Step 3: Cross multiply
    378,911.06x = 522,897.32 × 209,145.23
  4. Step 4: Simplify right side
    378,911.06x = 109,361,480,519.30
  5. Step 5: Solve for x
    x = 109,361,480,519.30/378,911.06
  6. Step 6: Final answer
    x = 288,620.45

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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.