Home / 1,308.10-1,961.93-430.33

Finding the Fourth Proportional to 1,308.10, 1,961.93 and 430.33

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Solution

The fourth proportional to 1,308.10, 1,961.93 and 430.33 is: 645.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,308.10 : 1,961.93 = 430.33 : x
  2. Step 2: Convert to fraction form
    1,308.10/1,961.93 = 430.33/x
  3. Step 3: Cross multiply
    1,308.10x = 1,961.93 × 430.33
  4. Step 4: Simplify right side
    1,308.10x = 844,273.51
  5. Step 5: Solve for x
    x = 844,273.51/1,308.10
  6. Step 6: Final answer
    x = 645.42

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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.