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Finding the Fourth Proportional to 1,305.15, 1,956.15 and 483

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Solution

The fourth proportional to 1,305.15, 1,956.15 and 483 is: 723.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,305.15 : 1,956.15 = 483 : x
  2. Step 2: Convert to fraction form
    1,305.15/1,956.15 = 483/x
  3. Step 3: Cross multiply
    1,305.15x = 1,956.15 × 483
  4. Step 4: Simplify right side
    1,305.15x = 944,820.45
  5. Step 5: Solve for x
    x = 944,820.45/1,305.15
  6. Step 6: Final answer
    x = 723.92

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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.