Home / 1,384.04-2,075.82-518.20

Finding the Fourth Proportional to 1,384.04, 2,075.82 and 518.20

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Solution

The fourth proportional to 1,384.04, 2,075.82 and 518.20 is: 777.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,384.04 : 2,075.82 = 518.20 : x
  2. Step 2: Convert to fraction form
    1,384.04/2,075.82 = 518.20/x
  3. Step 3: Cross multiply
    1,384.04x = 2,075.82 × 518.20
  4. Step 4: Simplify right side
    1,384.04x = 1,075,689.92
  5. Step 5: Solve for x
    x = 1,075,689.92/1,384.04
  6. Step 6: Final answer
    x = 777.21

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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.