Home / 1,208.90-1,814.70-1,129.58

Finding the Fourth Proportional to 1,208.90, 1,814.70 and 1,129.58

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Solution

The fourth proportional to 1,208.90, 1,814.70 and 1,129.58 is: 1,695.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.90 : 1,814.70 = 1,129.58 : x
  2. Step 2: Convert to fraction form
    1,208.90/1,814.70 = 1,129.58/x
  3. Step 3: Cross multiply
    1,208.90x = 1,814.70 × 1,129.58
  4. Step 4: Simplify right side
    1,208.90x = 2,049,848.83
  5. Step 5: Solve for x
    x = 2,049,848.83/1,208.90
  6. Step 6: Final answer
    x = 1,695.63

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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.