Home / 1,130.22-1,556.24-989.55

Finding the Fourth Proportional to 1,130.22, 1,556.24 and 989.55

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Solution

The fourth proportional to 1,130.22, 1,556.24 and 989.55 is: 1,362.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,130.22 : 1,556.24 = 989.55 : x
  2. Step 2: Convert to fraction form
    1,130.22/1,556.24 = 989.55/x
  3. Step 3: Cross multiply
    1,130.22x = 1,556.24 × 989.55
  4. Step 4: Simplify right side
    1,130.22x = 1,539,977.29
  5. Step 5: Solve for x
    x = 1,539,977.29/1,130.22
  6. Step 6: Final answer
    x = 1,362.55

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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.