Home / 838,206-1,256,433.75-388,556.10

Finding the Fourth Proportional to 838,206, 1,256,433.75 and 388,556.10

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Solution

The fourth proportional to 838,206, 1,256,433.75 and 388,556.10 is: 582,428.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    838,206 : 1,256,433.75 = 388,556.10 : x
  2. Step 2: Convert to fraction form
    838,206/1,256,433.75 = 388,556.10/x
  3. Step 3: Cross multiply
    838,206x = 1,256,433.75 × 388,556.10
  4. Step 4: Simplify right side
    838,206x = 488,194,997,808.38
  5. Step 5: Solve for x
    x = 488,194,997,808.38/838,206
  6. Step 6: Final answer
    x = 582,428.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.