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Finding the Fourth Proportional to 949.16, 1,416.39 and 839.81

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Solution

The fourth proportional to 949.16, 1,416.39 and 839.81 is: 1,253.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.16 : 1,416.39 = 839.81 : x
  2. Step 2: Convert to fraction form
    949.16/1,416.39 = 839.81/x
  3. Step 3: Cross multiply
    949.16x = 1,416.39 × 839.81
  4. Step 4: Simplify right side
    949.16x = 1,189,498.49
  5. Step 5: Solve for x
    x = 1,189,498.49/949.16
  6. Step 6: Final answer
    x = 1,253.21

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.