Home / 378,928.29-522,883.80-209,151.48

Finding the Fourth Proportional to 378,928.29, 522,883.80 and 209,151.48

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Solution

The fourth proportional to 378,928.29, 522,883.80 and 209,151.48 is: 288,608.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,928.29 : 522,883.80 = 209,151.48 : x
  2. Step 2: Convert to fraction form
    378,928.29/522,883.80 = 209,151.48/x
  3. Step 3: Cross multiply
    378,928.29x = 522,883.80 × 209,151.48
  4. Step 4: Simplify right side
    378,928.29x = 109,361,920,638.02
  5. Step 5: Solve for x
    x = 109,361,920,638.02/378,928.29
  6. Step 6: Final answer
    x = 288,608.49

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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.