Home / 1,079.10-1,619.25-429.88

Finding the Fourth Proportional to 1,079.10, 1,619.25 and 429.88

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Solution

The fourth proportional to 1,079.10, 1,619.25 and 429.88 is: 645.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.10 : 1,619.25 = 429.88 : x
  2. Step 2: Convert to fraction form
    1,079.10/1,619.25 = 429.88/x
  3. Step 3: Cross multiply
    1,079.10x = 1,619.25 × 429.88
  4. Step 4: Simplify right side
    1,079.10x = 696,083.19
  5. Step 5: Solve for x
    x = 696,083.19/1,079.10
  6. Step 6: Final answer
    x = 645.06

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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.