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Finding the Fourth Proportional to 1,383.85, 2,075.77 and 561.94

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Solution

The fourth proportional to 1,383.85, 2,075.77 and 561.94 is: 842.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.85 : 2,075.77 = 561.94 : x
  2. Step 2: Convert to fraction form
    1,383.85/2,075.77 = 561.94/x
  3. Step 3: Cross multiply
    1,383.85x = 2,075.77 × 561.94
  4. Step 4: Simplify right side
    1,383.85x = 1,166,453.71
  5. Step 5: Solve for x
    x = 1,166,453.71/1,383.85
  6. Step 6: Final answer
    x = 842.90

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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.