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Finding the Fourth Proportional to 956.21, 1,435.52 and 812.84

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Solution

The fourth proportional to 956.21, 1,435.52 and 812.84 is: 1,220.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    956.21 : 1,435.52 = 812.84 : x
  2. Step 2: Convert to fraction form
    956.21/1,435.52 = 812.84/x
  3. Step 3: Cross multiply
    956.21x = 1,435.52 × 812.84
  4. Step 4: Simplify right side
    956.21x = 1,166,842.93
  5. Step 5: Solve for x
    x = 1,166,842.93/956.21
  6. Step 6: Final answer
    x = 1,220.29

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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.