Home / 1,815.57-2,502.75-1,421.91

Finding the Fourth Proportional to 1,815.57, 2,502.75 and 1,421.91

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Solution

The fourth proportional to 1,815.57, 2,502.75 and 1,421.91 is: 1,960.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,815.57 : 2,502.75 = 1,421.91 : x
  2. Step 2: Convert to fraction form
    1,815.57/2,502.75 = 1,421.91/x
  3. Step 3: Cross multiply
    1,815.57x = 2,502.75 × 1,421.91
  4. Step 4: Simplify right side
    1,815.57x = 3,558,685.25
  5. Step 5: Solve for x
    x = 3,558,685.25/1,815.57
  6. Step 6: Final answer
    x = 1,960.09

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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.