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Finding the Fourth Proportional to 1,081.40, 1,622.19 and 350.99

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Solution

The fourth proportional to 1,081.40, 1,622.19 and 350.99 is: 526.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.40 : 1,622.19 = 350.99 : x
  2. Step 2: Convert to fraction form
    1,081.40/1,622.19 = 350.99/x
  3. Step 3: Cross multiply
    1,081.40x = 1,622.19 × 350.99
  4. Step 4: Simplify right side
    1,081.40x = 569,372.47
  5. Step 5: Solve for x
    x = 569,372.47/1,081.40
  6. Step 6: Final answer
    x = 526.51

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.