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Finding the Fourth Proportional to 1,956.36, 2,934.49 and 786

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Solution

The fourth proportional to 1,956.36, 2,934.49 and 786 is: 1,178.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,956.36 : 2,934.49 = 786 : x
  2. Step 2: Convert to fraction form
    1,956.36/2,934.49 = 786/x
  3. Step 3: Cross multiply
    1,956.36x = 2,934.49 × 786
  4. Step 4: Simplify right side
    1,956.36x = 2,306,509.14
  5. Step 5: Solve for x
    x = 2,306,509.14/1,956.36
  6. Step 6: Final answer
    x = 1,178.98

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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.