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Finding the Fourth Proportional to 910.83, 1,366.94 and 667.99

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Solution

The fourth proportional to 910.83, 1,366.94 and 667.99 is: 1,002.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.83 : 1,366.94 = 667.99 : x
  2. Step 2: Convert to fraction form
    910.83/1,366.94 = 667.99/x
  3. Step 3: Cross multiply
    910.83x = 1,366.94 × 667.99
  4. Step 4: Simplify right side
    910.83x = 913,102.25
  5. Step 5: Solve for x
    x = 913,102.25/910.83
  6. Step 6: Final answer
    x = 1,002.49

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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.