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Finding the Fourth Proportional to 1,779.33, 2,455.55 and 993.43

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Solution

The fourth proportional to 1,779.33, 2,455.55 and 993.43 is: 1,370.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.33 : 2,455.55 = 993.43 : x
  2. Step 2: Convert to fraction form
    1,779.33/2,455.55 = 993.43/x
  3. Step 3: Cross multiply
    1,779.33x = 2,455.55 × 993.43
  4. Step 4: Simplify right side
    1,779.33x = 2,439,417.04
  5. Step 5: Solve for x
    x = 2,439,417.04/1,779.33
  6. Step 6: Final answer
    x = 1,370.98

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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.