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Finding the Fourth Proportional to 849.06, 1,272.74 and 478.43

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Solution

The fourth proportional to 849.06, 1,272.74 and 478.43 is: 717.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    849.06 : 1,272.74 = 478.43 : x
  2. Step 2: Convert to fraction form
    849.06/1,272.74 = 478.43/x
  3. Step 3: Cross multiply
    849.06x = 1,272.74 × 478.43
  4. Step 4: Simplify right side
    849.06x = 608,917.00
  5. Step 5: Solve for x
    x = 608,917.00/849.06
  6. Step 6: Final answer
    x = 717.17

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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.