Home / 1,395.95-2,094.79-1,290.05

Finding the Fourth Proportional to 1,395.95, 2,094.79 and 1,290.05

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Solution

The fourth proportional to 1,395.95, 2,094.79 and 1,290.05 is: 1,935.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.95 : 2,094.79 = 1,290.05 : x
  2. Step 2: Convert to fraction form
    1,395.95/2,094.79 = 1,290.05/x
  3. Step 3: Cross multiply
    1,395.95x = 2,094.79 × 1,290.05
  4. Step 4: Simplify right side
    1,395.95x = 2,702,377.59
  5. Step 5: Solve for x
    x = 2,702,377.59/1,395.95
  6. Step 6: Final answer
    x = 1,935.87

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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.