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Finding the Fourth Proportional to 4,786.40, 7,179.76 and 1,323.36

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Solution

The fourth proportional to 4,786.40, 7,179.76 and 1,323.36 is: 1,985.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,786.40 : 7,179.76 = 1,323.36 : x
  2. Step 2: Convert to fraction form
    4,786.40/7,179.76 = 1,323.36/x
  3. Step 3: Cross multiply
    4,786.40x = 7,179.76 × 1,323.36
  4. Step 4: Simplify right side
    4,786.40x = 9,501,407.19
  5. Step 5: Solve for x
    x = 9,501,407.19/4,786.40
  6. Step 6: Final answer
    x = 1,985.08

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.