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Finding the Fourth Proportional to 1,207.06, 1,664.20 and 957.95

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Solution

The fourth proportional to 1,207.06, 1,664.20 and 957.95 is: 1,320.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207.06 : 1,664.20 = 957.95 : x
  2. Step 2: Convert to fraction form
    1,207.06/1,664.20 = 957.95/x
  3. Step 3: Cross multiply
    1,207.06x = 1,664.20 × 957.95
  4. Step 4: Simplify right side
    1,207.06x = 1,594,220.39
  5. Step 5: Solve for x
    x = 1,594,220.39/1,207.06
  6. Step 6: Final answer
    x = 1,320.75

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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.