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Finding the Fourth Proportional to 4,779.38, 7,169.34 and 1,316.64

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Solution

The fourth proportional to 4,779.38, 7,169.34 and 1,316.64 is: 1,975.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,779.38 : 7,169.34 = 1,316.64 : x
  2. Step 2: Convert to fraction form
    4,779.38/7,169.34 = 1,316.64/x
  3. Step 3: Cross multiply
    4,779.38x = 7,169.34 × 1,316.64
  4. Step 4: Simplify right side
    4,779.38x = 9,439,439.82
  5. Step 5: Solve for x
    x = 9,439,439.82/4,779.38
  6. Step 6: Final answer
    x = 1,975.03

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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.