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Finding the Fourth Proportional to 2,805.23, 3,868.35 and 1,860.69

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Solution

The fourth proportional to 2,805.23, 3,868.35 and 1,860.69 is: 2,565.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,805.23 : 3,868.35 = 1,860.69 : x
  2. Step 2: Convert to fraction form
    2,805.23/3,868.35 = 1,860.69/x
  3. Step 3: Cross multiply
    2,805.23x = 3,868.35 × 1,860.69
  4. Step 4: Simplify right side
    2,805.23x = 7,197,800.16
  5. Step 5: Solve for x
    x = 7,197,800.16/2,805.23
  6. Step 6: Final answer
    x = 2,565.85

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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.