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Finding the Fourth Proportional to 769,368.60, 1,155,435.30 and 744,485.40

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Solution

The fourth proportional to 769,368.60, 1,155,435.30 and 744,485.40 is: 1,118,065.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,368.60 : 1,155,435.30 = 744,485.40 : x
  2. Step 2: Convert to fraction form
    769,368.60/1,155,435.30 = 744,485.40/x
  3. Step 3: Cross multiply
    769,368.60x = 1,155,435.30 × 744,485.40
  4. Step 4: Simplify right side
    769,368.60x = 860,204,711,494.62
  5. Step 5: Solve for x
    x = 860,204,711,494.62/769,368.60
  6. Step 6: Final answer
    x = 1,118,065.79

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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.