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Finding the Fourth Proportional to 980,771.13, 1,354,068 and 777,642.57

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Solution

The fourth proportional to 980,771.13, 1,354,068 and 777,642.57 is: 1,073,625.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,771.13 : 1,354,068 = 777,642.57 : x
  2. Step 2: Convert to fraction form
    980,771.13/1,354,068 = 777,642.57/x
  3. Step 3: Cross multiply
    980,771.13x = 1,354,068 × 777,642.57
  4. Step 4: Simplify right side
    980,771.13x = 1,052,980,919,474.76
  5. Step 5: Solve for x
    x = 1,052,980,919,474.76/980,771.13
  6. Step 6: Final answer
    x = 1,073,625.53

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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.