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Finding the Fourth Proportional to 1,360.95, 2,041.15 and 386.79

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Solution

The fourth proportional to 1,360.95, 2,041.15 and 386.79 is: 580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,360.95 : 2,041.15 = 386.79 : x
  2. Step 2: Convert to fraction form
    1,360.95/2,041.15 = 386.79/x
  3. Step 3: Cross multiply
    1,360.95x = 2,041.15 × 386.79
  4. Step 4: Simplify right side
    1,360.95x = 789,496.41
  5. Step 5: Solve for x
    x = 789,496.41/1,360.95
  6. Step 6: Final answer
    x = 580.11

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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.