Home / 1,297.13-1,945.93-419.76

Finding the Fourth Proportional to 1,297.13, 1,945.93 and 419.76

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Solution

The fourth proportional to 1,297.13, 1,945.93 and 419.76 is: 629.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.13 : 1,945.93 = 419.76 : x
  2. Step 2: Convert to fraction form
    1,297.13/1,945.93 = 419.76/x
  3. Step 3: Cross multiply
    1,297.13x = 1,945.93 × 419.76
  4. Step 4: Simplify right side
    1,297.13x = 816,823.58
  5. Step 5: Solve for x
    x = 816,823.58/1,297.13
  6. Step 6: Final answer
    x = 629.72

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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.