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Finding the Fourth Proportional to 6,321,978.18, 8,718,407.73 and 4,196,503.08

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Solution

The fourth proportional to 6,321,978.18, 8,718,407.73 and 4,196,503.08 is: 5,787,243.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,321,978.18 : 8,718,407.73 = 4,196,503.08 : x
  2. Step 2: Convert to fraction form
    6,321,978.18/8,718,407.73 = 4,196,503.08/x
  3. Step 3: Cross multiply
    6,321,978.18x = 8,718,407.73 × 4,196,503.08
  4. Step 4: Simplify right side
    6,321,978.18x = 36,586,824,891,640.81
  5. Step 5: Solve for x
    x = 36,586,824,891,640.81/6,321,978.18
  6. Step 6: Final answer
    x = 5,787,243.15

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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.