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Finding the Fourth Proportional to 326,253.10, 489,221.43 and 191,361.25

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Solution

The fourth proportional to 326,253.10, 489,221.43 and 191,361.25 is: 286,949.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,253.10 : 489,221.43 = 191,361.25 : x
  2. Step 2: Convert to fraction form
    326,253.10/489,221.43 = 191,361.25/x
  3. Step 3: Cross multiply
    326,253.10x = 489,221.43 × 191,361.25
  4. Step 4: Simplify right side
    326,253.10x = 93,618,020,968.67
  5. Step 5: Solve for x
    x = 93,618,020,968.67/326,253.10
  6. Step 6: Final answer
    x = 286,949.07

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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.