Home / 1,285.52-1,927.85-419.63

Finding the Fourth Proportional to 1,285.52, 1,927.85 and 419.63

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Solution

The fourth proportional to 1,285.52, 1,927.85 and 419.63 is: 629.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.52 : 1,927.85 = 419.63 : x
  2. Step 2: Convert to fraction form
    1,285.52/1,927.85 = 419.63/x
  3. Step 3: Cross multiply
    1,285.52x = 1,927.85 × 419.63
  4. Step 4: Simplify right side
    1,285.52x = 808,971.96
  5. Step 5: Solve for x
    x = 808,971.96/1,285.52
  6. Step 6: Final answer
    x = 629.30

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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.