Home / 1,815.52-2,503.20-1,290.64

Finding the Fourth Proportional to 1,815.52, 2,503.20 and 1,290.64

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Solution

The fourth proportional to 1,815.52, 2,503.20 and 1,290.64 is: 1,779.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.52 : 2,503.20 = 1,290.64 : x
  2. Step 2: Convert to fraction form
    1,815.52/2,503.20 = 1,290.64/x
  3. Step 3: Cross multiply
    1,815.52x = 2,503.20 × 1,290.64
  4. Step 4: Simplify right side
    1,815.52x = 3,230,730.05
  5. Step 5: Solve for x
    x = 3,230,730.05/1,815.52
  6. Step 6: Final answer
    x = 1,779.51

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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.