Home / 378,870.09-522,839.66-209,103

Finding the Fourth Proportional to 378,870.09, 522,839.66 and 209,103

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Solution

The fourth proportional to 378,870.09, 522,839.66 and 209,103 is: 288,561.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,870.09 : 522,839.66 = 209,103 : x
  2. Step 2: Convert to fraction form
    378,870.09/522,839.66 = 209,103/x
  3. Step 3: Cross multiply
    378,870.09x = 522,839.66 × 209,103
  4. Step 4: Simplify right side
    378,870.09x = 109,327,340,379.47
  5. Step 5: Solve for x
    x = 109,327,340,379.47/378,870.09
  6. Step 6: Final answer
    x = 288,561.55

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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.