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Finding the Fourth Proportional to 386,324.10, 579,486.15 and 364,672.80

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Solution

The fourth proportional to 386,324.10, 579,486.15 and 364,672.80 is: 547,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,324.10 : 579,486.15 = 364,672.80 : x
  2. Step 2: Convert to fraction form
    386,324.10/579,486.15 = 364,672.80/x
  3. Step 3: Cross multiply
    386,324.10x = 579,486.15 × 364,672.80
  4. Step 4: Simplify right side
    386,324.10x = 211,322,836,881.72
  5. Step 5: Solve for x
    x = 211,322,836,881.72/386,324.10
  6. Step 6: Final answer
    x = 547,009.20

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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.