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Finding the Fourth Proportional to 1,305.89, 1,958.25 and 612.00

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Solution

The fourth proportional to 1,305.89, 1,958.25 and 612.00 is: 917.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.89 : 1,958.25 = 612.00 : x
  2. Step 2: Convert to fraction form
    1,305.89/1,958.25 = 612.00/x
  3. Step 3: Cross multiply
    1,305.89x = 1,958.25 × 612.00
  4. Step 4: Simplify right side
    1,305.89x = 1,198,444.07
  5. Step 5: Solve for x
    x = 1,198,444.07/1,305.89
  6. Step 6: Final answer
    x = 917.72

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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.