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Finding the Fourth Proportional to 859,132.60, 1,288,698.90 and 853,883.80

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Solution

The fourth proportional to 859,132.60, 1,288,698.90 and 853,883.80 is: 1,280,825.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,132.60 : 1,288,698.90 = 853,883.80 : x
  2. Step 2: Convert to fraction form
    859,132.60/1,288,698.90 = 853,883.80/x
  3. Step 3: Cross multiply
    859,132.60x = 1,288,698.90 × 853,883.80
  4. Step 4: Simplify right side
    859,132.60x = 1,100,399,113,787.82
  5. Step 5: Solve for x
    x = 1,100,399,113,787.82/859,132.60
  6. Step 6: Final answer
    x = 1,280,825.70

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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.