Home / 1,105.92-1,521.45-1,075.14

Finding the Fourth Proportional to 1,105.92, 1,521.45 and 1,075.14

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Solution

The fourth proportional to 1,105.92, 1,521.45 and 1,075.14 is: 1,479.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.92 : 1,521.45 = 1,075.14 : x
  2. Step 2: Convert to fraction form
    1,105.92/1,521.45 = 1,075.14/x
  3. Step 3: Cross multiply
    1,105.92x = 1,521.45 × 1,075.14
  4. Step 4: Simplify right side
    1,105.92x = 1,635,771.75
  5. Step 5: Solve for x
    x = 1,635,771.75/1,105.92
  6. Step 6: Final answer
    x = 1,479.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.