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Finding the Fourth Proportional to 525,729.60, 789,112.80 and 259,790.40

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Solution

The fourth proportional to 525,729.60, 789,112.80 and 259,790.40 is: 389,941.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,729.60 : 789,112.80 = 259,790.40 : x
  2. Step 2: Convert to fraction form
    525,729.60/789,112.80 = 259,790.40/x
  3. Step 3: Cross multiply
    525,729.60x = 789,112.80 × 259,790.40
  4. Step 4: Simplify right side
    525,729.60x = 205,003,929,957.12
  5. Step 5: Solve for x
    x = 205,003,929,957.12/525,729.60
  6. Step 6: Final answer
    x = 389,941.77

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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.