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Finding the Fourth Proportional to 848.85, 1,273.63 and 780.74

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Solution

The fourth proportional to 848.85, 1,273.63 and 780.74 is: 1,171.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.85 : 1,273.63 = 780.74 : x
  2. Step 2: Convert to fraction form
    848.85/1,273.63 = 780.74/x
  3. Step 3: Cross multiply
    848.85x = 1,273.63 × 780.74
  4. Step 4: Simplify right side
    848.85x = 994,365.57
  5. Step 5: Solve for x
    x = 994,365.57/848.85
  6. Step 6: Final answer
    x = 1,171.43

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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.