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Finding the Fourth Proportional to 2,077.94, 3,117.54 and 779.60

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Solution

The fourth proportional to 2,077.94, 3,117.54 and 779.60 is: 1,169.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.94 : 3,117.54 = 779.60 : x
  2. Step 2: Convert to fraction form
    2,077.94/3,117.54 = 779.60/x
  3. Step 3: Cross multiply
    2,077.94x = 3,117.54 × 779.60
  4. Step 4: Simplify right side
    2,077.94x = 2,430,434.18
  5. Step 5: Solve for x
    x = 2,430,434.18/2,077.94
  6. Step 6: Final answer
    x = 1,169.64

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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.