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Finding the Fourth Proportional to 680,124.66, 938,579.97 and 389,730.48

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Solution

The fourth proportional to 680,124.66, 938,579.97 and 389,730.48 is: 537,832.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,124.66 : 938,579.97 = 389,730.48 : x
  2. Step 2: Convert to fraction form
    680,124.66/938,579.97 = 389,730.48/x
  3. Step 3: Cross multiply
    680,124.66x = 938,579.97 × 389,730.48
  4. Step 4: Simplify right side
    680,124.66x = 365,793,222,226.49
  5. Step 5: Solve for x
    x = 365,793,222,226.49/680,124.66
  6. Step 6: Final answer
    x = 537,832.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.