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Finding the Fourth Proportional to 1,779.42, 2,455.77 and 993.54

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Solution

The fourth proportional to 1,779.42, 2,455.77 and 993.54 is: 1,371.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.42 : 2,455.77 = 993.54 : x
  2. Step 2: Convert to fraction form
    1,779.42/2,455.77 = 993.54/x
  3. Step 3: Cross multiply
    1,779.42x = 2,455.77 × 993.54
  4. Step 4: Simplify right side
    1,779.42x = 2,439,905.73
  5. Step 5: Solve for x
    x = 2,439,905.73/1,779.42
  6. Step 6: Final answer
    x = 1,371.18

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1.5x scale

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.