Home / 1,619.85-2,429.56-646.63

Finding the Fourth Proportional to 1,619.85, 2,429.56 and 646.63

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Solution

The fourth proportional to 1,619.85, 2,429.56 and 646.63 is: 969.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,619.85 : 2,429.56 = 646.63 : x
  2. Step 2: Convert to fraction form
    1,619.85/2,429.56 = 646.63/x
  3. Step 3: Cross multiply
    1,619.85x = 2,429.56 × 646.63
  4. Step 4: Simplify right side
    1,619.85x = 1,571,026.38
  5. Step 5: Solve for x
    x = 1,571,026.38/1,619.85
  6. Step 6: Final answer
    x = 969.86

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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.