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Finding the Fourth Proportional to 790.96, 1,091.55 and 441.65

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Solution

The fourth proportional to 790.96, 1,091.55 and 441.65 is: 609.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.96 : 1,091.55 = 441.65 : x
  2. Step 2: Convert to fraction form
    790.96/1,091.55 = 441.65/x
  3. Step 3: Cross multiply
    790.96x = 1,091.55 × 441.65
  4. Step 4: Simplify right side
    790.96x = 482,075.39
  5. Step 5: Solve for x
    x = 482,075.39/790.96
  6. Step 6: Final answer
    x = 609.48

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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.