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Finding the Fourth Proportional to 2,854.21, 4,281.41 and 774.21

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Solution

The fourth proportional to 2,854.21, 4,281.41 and 774.21 is: 1,161.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,854.21 : 4,281.41 = 774.21 : x
  2. Step 2: Convert to fraction form
    2,854.21/4,281.41 = 774.21/x
  3. Step 3: Cross multiply
    2,854.21x = 4,281.41 × 774.21
  4. Step 4: Simplify right side
    2,854.21x = 3,314,699.99
  5. Step 5: Solve for x
    x = 3,314,699.99/2,854.21
  6. Step 6: Final answer
    x = 1,161.34

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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.