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Finding the Fourth Proportional to 805,969.80, 1,208,954.70 and 770,540.40

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Solution

The fourth proportional to 805,969.80, 1,208,954.70 and 770,540.40 is: 1,155,810.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,969.80 : 1,208,954.70 = 770,540.40 : x
  2. Step 2: Convert to fraction form
    805,969.80/1,208,954.70 = 770,540.40/x
  3. Step 3: Cross multiply
    805,969.80x = 1,208,954.70 × 770,540.40
  4. Step 4: Simplify right side
    805,969.80x = 931,548,438,119.88
  5. Step 5: Solve for x
    x = 931,548,438,119.88/805,969.80
  6. Step 6: Final answer
    x = 1,155,810.60

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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.