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Finding the Fourth Proportional to 386,243.64, 579,409.20 and 346,556.88

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Solution

The fourth proportional to 386,243.64, 579,409.20 and 346,556.88 is: 519,874.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,243.64 : 579,409.20 = 346,556.88 : x
  2. Step 2: Convert to fraction form
    386,243.64/579,409.20 = 346,556.88/x
  3. Step 3: Cross multiply
    386,243.64x = 579,409.20 × 346,556.88
  4. Step 4: Simplify right side
    386,243.64x = 200,798,244,595.30
  5. Step 5: Solve for x
    x = 200,798,244,595.30/386,243.64
  6. Step 6: Final answer
    x = 519,874.57

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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.