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Finding the Fourth Proportional to 386,344.80, 579,683.76 and 208,976.64

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Solution

The fourth proportional to 386,344.80, 579,683.76 and 208,976.64 is: 313,555.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,344.80 : 579,683.76 = 208,976.64 : x
  2. Step 2: Convert to fraction form
    386,344.80/579,683.76 = 208,976.64/x
  3. Step 3: Cross multiply
    386,344.80x = 579,683.76 × 208,976.64
  4. Step 4: Simplify right side
    386,344.80x = 121,140,364,427.37
  5. Step 5: Solve for x
    x = 121,140,364,427.37/386,344.80
  6. Step 6: Final answer
    x = 313,555.05

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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.