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Finding the Fourth Proportional to 949.25, 1,310.75 and 669.80

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Solution

The fourth proportional to 949.25, 1,310.75 and 669.80 is: 924.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.25 : 1,310.75 = 669.80 : x
  2. Step 2: Convert to fraction form
    949.25/1,310.75 = 669.80/x
  3. Step 3: Cross multiply
    949.25x = 1,310.75 × 669.80
  4. Step 4: Simplify right side
    949.25x = 877,935.47
  5. Step 5: Solve for x
    x = 877,935.47/949.25
  6. Step 6: Final answer
    x = 924.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.