Home / 386,213.30-579,479.82-208,511.31

Finding the Fourth Proportional to 386,213.30, 579,479.82 and 208,511.31

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Solution

The fourth proportional to 386,213.30, 579,479.82 and 208,511.31 is: 312,853.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,213.30 : 579,479.82 = 208,511.31 : x
  2. Step 2: Convert to fraction form
    386,213.30/579,479.82 = 208,511.31/x
  3. Step 3: Cross multiply
    386,213.30x = 579,479.82 × 208,511.31
  4. Step 4: Simplify right side
    386,213.30x = 120,828,095,344.21
  5. Step 5: Solve for x
    x = 120,828,095,344.21/386,213.30
  6. Step 6: Final answer
    x = 312,853.28

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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.