Home / 1,815.08-2,723.70-1,387.40

Finding the Fourth Proportional to 1,815.08, 2,723.70 and 1,387.40

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Solution

The fourth proportional to 1,815.08, 2,723.70 and 1,387.40 is: 2,081.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.08 : 2,723.70 = 1,387.40 : x
  2. Step 2: Convert to fraction form
    1,815.08/2,723.70 = 1,387.40/x
  3. Step 3: Cross multiply
    1,815.08x = 2,723.70 × 1,387.40
  4. Step 4: Simplify right side
    1,815.08x = 3,778,861.38
  5. Step 5: Solve for x
    x = 3,778,861.38/1,815.08
  6. Step 6: Final answer
    x = 2,081.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.