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Finding the Fourth Proportional to 2,103.79, 2,903.58 and 1,605.49

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Solution

The fourth proportional to 2,103.79, 2,903.58 and 1,605.49 is: 2,215.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,103.79 : 2,903.58 = 1,605.49 : x
  2. Step 2: Convert to fraction form
    2,103.79/2,903.58 = 1,605.49/x
  3. Step 3: Cross multiply
    2,103.79x = 2,903.58 × 1,605.49
  4. Step 4: Simplify right side
    2,103.79x = 4,661,668.65
  5. Step 5: Solve for x
    x = 4,661,668.65/2,103.79
  6. Step 6: Final answer
    x = 2,215.84

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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.