Home / 1,384.11-2,075.79-690.26

Finding the Fourth Proportional to 1,384.11, 2,075.79 and 690.26

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Solution

The fourth proportional to 1,384.11, 2,075.79 and 690.26 is: 1,035.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.11 : 2,075.79 = 690.26 : x
  2. Step 2: Convert to fraction form
    1,384.11/2,075.79 = 690.26/x
  3. Step 3: Cross multiply
    1,384.11x = 2,075.79 × 690.26
  4. Step 4: Simplify right side
    1,384.11x = 1,432,839.99
  5. Step 5: Solve for x
    x = 1,432,839.99/1,384.11
  6. Step 6: Final answer
    x = 1,035.21

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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.