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Finding the Fourth Proportional to 1,779.34, 2,455.49 and 993.39

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Solution

The fourth proportional to 1,779.34, 2,455.49 and 993.39 is: 1,370.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.34 : 2,455.49 = 993.39 : x
  2. Step 2: Convert to fraction form
    1,779.34/2,455.49 = 993.39/x
  3. Step 3: Cross multiply
    1,779.34x = 2,455.49 × 993.39
  4. Step 4: Simplify right side
    1,779.34x = 2,439,259.21
  5. Step 5: Solve for x
    x = 2,439,259.21/1,779.34
  6. Step 6: Final answer
    x = 1,370.88

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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.