Home / 1,285.07-1,927.61-419.38

Finding the Fourth Proportional to 1,285.07, 1,927.61 and 419.38

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Solution

The fourth proportional to 1,285.07, 1,927.61 and 419.38 is: 629.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.07 : 1,927.61 = 419.38 : x
  2. Step 2: Convert to fraction form
    1,285.07/1,927.61 = 419.38/x
  3. Step 3: Cross multiply
    1,285.07x = 1,927.61 × 419.38
  4. Step 4: Simplify right side
    1,285.07x = 808,406.58
  5. Step 5: Solve for x
    x = 808,406.58/1,285.07
  6. Step 6: Final answer
    x = 629.08

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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.