Home / 857.03-1,285.58-272.04

Finding the Fourth Proportional to 857.03, 1,285.58 and 272.04

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Solution

The fourth proportional to 857.03, 1,285.58 and 272.04 is: 408.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    857.03 : 1,285.58 = 272.04 : x
  2. Step 2: Convert to fraction form
    857.03/1,285.58 = 272.04/x
  3. Step 3: Cross multiply
    857.03x = 1,285.58 × 272.04
  4. Step 4: Simplify right side
    857.03x = 349,723.00
  5. Step 5: Solve for x
    x = 349,723.00/857.03
  6. Step 6: Final answer
    x = 408.06

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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.