Home / 1,398.86-2,096.30-1,089.35

Finding the Fourth Proportional to 1,398.86, 2,096.30 and 1,089.35

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Solution

The fourth proportional to 1,398.86, 2,096.30 and 1,089.35 is: 1,632.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398.86 : 2,096.30 = 1,089.35 : x
  2. Step 2: Convert to fraction form
    1,398.86/2,096.30 = 1,089.35/x
  3. Step 3: Cross multiply
    1,398.86x = 2,096.30 × 1,089.35
  4. Step 4: Simplify right side
    1,398.86x = 2,283,588.48
  5. Step 5: Solve for x
    x = 2,283,588.48/1,398.86
  6. Step 6: Final answer
    x = 1,632.47

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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.