Home / 1,178.80-1,623.67-1,091.23

Finding the Fourth Proportional to 1,178.80, 1,623.67 and 1,091.23

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Solution

The fourth proportional to 1,178.80, 1,623.67 and 1,091.23 is: 1,503.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.80 : 1,623.67 = 1,091.23 : x
  2. Step 2: Convert to fraction form
    1,178.80/1,623.67 = 1,091.23/x
  3. Step 3: Cross multiply
    1,178.80x = 1,623.67 × 1,091.23
  4. Step 4: Simplify right side
    1,178.80x = 1,771,790.63
  5. Step 5: Solve for x
    x = 1,771,790.63/1,178.80
  6. Step 6: Final answer
    x = 1,503.05

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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.