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Finding the Fourth Proportional to 980,776.14, 1,354,074.90 and 777,647.58

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Solution

The fourth proportional to 980,776.14, 1,354,074.90 and 777,647.58 is: 1,073,632.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,776.14 : 1,354,074.90 = 777,647.58 : x
  2. Step 2: Convert to fraction form
    980,776.14/1,354,074.90 = 777,647.58/x
  3. Step 3: Cross multiply
    980,776.14x = 1,354,074.90 × 777,647.58
  4. Step 4: Simplify right side
    980,776.14x = 1,052,993,069,123.74
  5. Step 5: Solve for x
    x = 1,052,993,069,123.74/980,776.14
  6. Step 6: Final answer
    x = 1,073,632.43

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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.