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Finding the Fourth Proportional to 2,321.50, 3,482.19 and 860.94

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Solution

The fourth proportional to 2,321.50, 3,482.19 and 860.94 is: 1,291.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.50 : 3,482.19 = 860.94 : x
  2. Step 2: Convert to fraction form
    2,321.50/3,482.19 = 860.94/x
  3. Step 3: Cross multiply
    2,321.50x = 3,482.19 × 860.94
  4. Step 4: Simplify right side
    2,321.50x = 2,997,956.66
  5. Step 5: Solve for x
    x = 2,997,956.66/2,321.50
  6. Step 6: Final answer
    x = 1,291.39

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1.5x scale

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.