Home / 1,051.05-1,576.80-320.70

Finding the Fourth Proportional to 1,051.05, 1,576.80 and 320.70

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Solution

The fourth proportional to 1,051.05, 1,576.80 and 320.70 is: 481.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,051.05 : 1,576.80 = 320.70 : x
  2. Step 2: Convert to fraction form
    1,051.05/1,576.80 = 320.70/x
  3. Step 3: Cross multiply
    1,051.05x = 1,576.80 × 320.70
  4. Step 4: Simplify right side
    1,051.05x = 505,679.76
  5. Step 5: Solve for x
    x = 505,679.76/1,051.05
  6. Step 6: Final answer
    x = 481.12

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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.