Home / 1,289.07-1,777.77-1,090.82

Finding the Fourth Proportional to 1,289.07, 1,777.77 and 1,090.82

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Solution

The fourth proportional to 1,289.07, 1,777.77 and 1,090.82 is: 1,504.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.07 : 1,777.77 = 1,090.82 : x
  2. Step 2: Convert to fraction form
    1,289.07/1,777.77 = 1,090.82/x
  3. Step 3: Cross multiply
    1,289.07x = 1,777.77 × 1,090.82
  4. Step 4: Simplify right side
    1,289.07x = 1,939,231.52
  5. Step 5: Solve for x
    x = 1,939,231.52/1,289.07
  6. Step 6: Final answer
    x = 1,504.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.