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Finding the Fourth Proportional to 947.33, 1,421.46 and 330.77

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Solution

The fourth proportional to 947.33, 1,421.46 and 330.77 is: 496.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    947.33 : 1,421.46 = 330.77 : x
  2. Step 2: Convert to fraction form
    947.33/1,421.46 = 330.77/x
  3. Step 3: Cross multiply
    947.33x = 1,421.46 × 330.77
  4. Step 4: Simplify right side
    947.33x = 470,169.22
  5. Step 5: Solve for x
    x = 470,169.22/947.33
  6. Step 6: Final answer
    x = 496.31

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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.