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Finding the Fourth Proportional to 949.54, 1,309.80 and 700.78

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Solution

The fourth proportional to 949.54, 1,309.80 and 700.78 is: 966.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.54 : 1,309.80 = 700.78 : x
  2. Step 2: Convert to fraction form
    949.54/1,309.80 = 700.78/x
  3. Step 3: Cross multiply
    949.54x = 1,309.80 × 700.78
  4. Step 4: Simplify right side
    949.54x = 917,881.64
  5. Step 5: Solve for x
    x = 917,881.64/949.54
  6. Step 6: Final answer
    x = 966.66

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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.