Home / 2,151.63-3,225.40-689.79

Finding the Fourth Proportional to 2,151.63, 3,225.40 and 689.79

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Solution

The fourth proportional to 2,151.63, 3,225.40 and 689.79 is: 1,034.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.63 : 3,225.40 = 689.79 : x
  2. Step 2: Convert to fraction form
    2,151.63/3,225.40 = 689.79/x
  3. Step 3: Cross multiply
    2,151.63x = 3,225.40 × 689.79
  4. Step 4: Simplify right side
    2,151.63x = 2,224,848.67
  5. Step 5: Solve for x
    x = 2,224,848.67/2,151.63
  6. Step 6: Final answer
    x = 1,034.03

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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.