Home / 1,285.08-1,927.80-419.46

Finding the Fourth Proportional to 1,285.08, 1,927.80 and 419.46

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Solution

The fourth proportional to 1,285.08, 1,927.80 and 419.46 is: 629.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.08 : 1,927.80 = 419.46 : x
  2. Step 2: Convert to fraction form
    1,285.08/1,927.80 = 419.46/x
  3. Step 3: Cross multiply
    1,285.08x = 1,927.80 × 419.46
  4. Step 4: Simplify right side
    1,285.08x = 808,634.99
  5. Step 5: Solve for x
    x = 808,634.99/1,285.08
  6. Step 6: Final answer
    x = 629.25

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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.