Home / 1,285.02-1,927.46-419.34

Finding the Fourth Proportional to 1,285.02, 1,927.46 and 419.34

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Solution

The fourth proportional to 1,285.02, 1,927.46 and 419.34 is: 628.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.02 : 1,927.46 = 419.34 : x
  2. Step 2: Convert to fraction form
    1,285.02/1,927.46 = 419.34/x
  3. Step 3: Cross multiply
    1,285.02x = 1,927.46 × 419.34
  4. Step 4: Simplify right side
    1,285.02x = 808,261.08
  5. Step 5: Solve for x
    x = 808,261.08/1,285.02
  6. Step 6: Final answer
    x = 628.99

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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.