Home / 378,913.06-522,900.08-209,147.23

Finding the Fourth Proportional to 378,913.06, 522,900.08 and 209,147.23

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Solution

The fourth proportional to 378,913.06, 522,900.08 and 209,147.23 is: 288,623.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,913.06 : 522,900.08 = 209,147.23 : x
  2. Step 2: Convert to fraction form
    378,913.06/522,900.08 = 209,147.23/x
  3. Step 3: Cross multiply
    378,913.06x = 522,900.08 × 209,147.23
  4. Step 4: Simplify right side
    378,913.06x = 109,363,103,298.78
  5. Step 5: Solve for x
    x = 109,363,103,298.78/378,913.06
  6. Step 6: Final answer
    x = 288,623.21

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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.