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Finding the Fourth Proportional to 1,779.26, 2,455.36 and 993.50

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Solution

The fourth proportional to 1,779.26, 2,455.36 and 993.50 is: 1,371.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.26 : 2,455.36 = 993.50 : x
  2. Step 2: Convert to fraction form
    1,779.26/2,455.36 = 993.50/x
  3. Step 3: Cross multiply
    1,779.26x = 2,455.36 × 993.50
  4. Step 4: Simplify right side
    1,779.26x = 2,439,400.16
  5. Step 5: Solve for x
    x = 2,439,400.16/1,779.26
  6. Step 6: Final answer
    x = 1,371.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.