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Finding the Fourth Proportional to 949.42, 1,421.72 and 794.96

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Solution

The fourth proportional to 949.42, 1,421.72 and 794.96 is: 1,190.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.42 : 1,421.72 = 794.96 : x
  2. Step 2: Convert to fraction form
    949.42/1,421.72 = 794.96/x
  3. Step 3: Cross multiply
    949.42x = 1,421.72 × 794.96
  4. Step 4: Simplify right side
    949.42x = 1,130,210.53
  5. Step 5: Solve for x
    x = 1,130,210.53/949.42
  6. Step 6: Final answer
    x = 1,190.42

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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.