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Finding the Fourth Proportional to 2,075.81, 3,114.32 and 777.38

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Solution

The fourth proportional to 2,075.81, 3,114.32 and 777.38 is: 1,166.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.81 : 3,114.32 = 777.38 : x
  2. Step 2: Convert to fraction form
    2,075.81/3,114.32 = 777.38/x
  3. Step 3: Cross multiply
    2,075.81x = 3,114.32 × 777.38
  4. Step 4: Simplify right side
    2,075.81x = 2,420,990.62
  5. Step 5: Solve for x
    x = 2,420,990.62/2,075.81
  6. Step 6: Final answer
    x = 1,166.29

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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.