Home / 1,290.68-1,793.47-1,277.32

Finding the Fourth Proportional to 1,290.68, 1,793.47 and 1,277.32

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Solution

The fourth proportional to 1,290.68, 1,793.47 and 1,277.32 is: 1,774.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.68 : 1,793.47 = 1,277.32 : x
  2. Step 2: Convert to fraction form
    1,290.68/1,793.47 = 1,277.32/x
  3. Step 3: Cross multiply
    1,290.68x = 1,793.47 × 1,277.32
  4. Step 4: Simplify right side
    1,290.68x = 2,290,835.10
  5. Step 5: Solve for x
    x = 2,290,835.10/1,290.68
  6. Step 6: Final answer
    x = 1,774.91

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.