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Finding the Fourth Proportional to 1,173.69, 1,620.36 and 1,127.22

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Solution

The fourth proportional to 1,173.69, 1,620.36 and 1,127.22 is: 1,556.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.69 : 1,620.36 = 1,127.22 : x
  2. Step 2: Convert to fraction form
    1,173.69/1,620.36 = 1,127.22/x
  3. Step 3: Cross multiply
    1,173.69x = 1,620.36 × 1,127.22
  4. Step 4: Simplify right side
    1,173.69x = 1,826,502.20
  5. Step 5: Solve for x
    x = 1,826,502.20/1,173.69
  6. Step 6: Final answer
    x = 1,556.20

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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.