Home / 1,246.32-1,866.21-1,089.45

Finding the Fourth Proportional to 1,246.32, 1,866.21 and 1,089.45

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Solution

The fourth proportional to 1,246.32, 1,866.21 and 1,089.45 is: 1,631.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,246.32 : 1,866.21 = 1,089.45 : x
  2. Step 2: Convert to fraction form
    1,246.32/1,866.21 = 1,089.45/x
  3. Step 3: Cross multiply
    1,246.32x = 1,866.21 × 1,089.45
  4. Step 4: Simplify right side
    1,246.32x = 2,033,138.40
  5. Step 5: Solve for x
    x = 2,033,138.40/1,246.32
  6. Step 6: Final answer
    x = 1,631.31

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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.