Home / 2,075.66-3,111.93-688.17

Finding the Fourth Proportional to 2,075.66, 3,111.93 and 688.17

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Solution

The fourth proportional to 2,075.66, 3,111.93 and 688.17 is: 1,031.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,075.66 : 3,111.93 = 688.17 : x
  2. Step 2: Convert to fraction form
    2,075.66/3,111.93 = 688.17/x
  3. Step 3: Cross multiply
    2,075.66x = 3,111.93 × 688.17
  4. Step 4: Simplify right side
    2,075.66x = 2,141,536.87
  5. Step 5: Solve for x
    x = 2,141,536.87/2,075.66
  6. Step 6: Final answer
    x = 1,031.74

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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.