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Finding the Fourth Proportional to 1,361.91, 2,041.05 and 777.09

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Solution

The fourth proportional to 1,361.91, 2,041.05 and 777.09 is: 1,164.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.91 : 2,041.05 = 777.09 : x
  2. Step 2: Convert to fraction form
    1,361.91/2,041.05 = 777.09/x
  3. Step 3: Cross multiply
    1,361.91x = 2,041.05 × 777.09
  4. Step 4: Simplify right side
    1,361.91x = 1,586,085.74
  5. Step 5: Solve for x
    x = 1,586,085.74/1,361.91
  6. Step 6: Final answer
    x = 1,164.60

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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.