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Finding the Fourth Proportional to 668,862.63, 922,969.49 and 396,883.67

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Solution

The fourth proportional to 668,862.63, 922,969.49 and 396,883.67 is: 547,663.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,862.63 : 922,969.49 = 396,883.67 : x
  2. Step 2: Convert to fraction form
    668,862.63/922,969.49 = 396,883.67/x
  3. Step 3: Cross multiply
    668,862.63x = 922,969.49 × 396,883.67
  4. Step 4: Simplify right side
    668,862.63x = 366,311,511,889.96
  5. Step 5: Solve for x
    x = 366,311,511,889.96/668,862.63
  6. Step 6: Final answer
    x = 547,663.30

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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.