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Finding the Fourth Proportional to 629,268, 868,718.16 and 489,256.14

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Solution

The fourth proportional to 629,268, 868,718.16 and 489,256.14 is: 675,428.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,268 : 868,718.16 = 489,256.14 : x
  2. Step 2: Convert to fraction form
    629,268/868,718.16 = 489,256.14/x
  3. Step 3: Cross multiply
    629,268x = 868,718.16 × 489,256.14
  4. Step 4: Simplify right side
    629,268x = 425,025,693,709.50
  5. Step 5: Solve for x
    x = 425,025,693,709.50/629,268
  6. Step 6: Final answer
    x = 675,428.74

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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.