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Finding the Fourth Proportional to 845.93, 1,268.95 and 478.09

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Solution

The fourth proportional to 845.93, 1,268.95 and 478.09 is: 717.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.93 : 1,268.95 = 478.09 : x
  2. Step 2: Convert to fraction form
    845.93/1,268.95 = 478.09/x
  3. Step 3: Cross multiply
    845.93x = 1,268.95 × 478.09
  4. Step 4: Simplify right side
    845.93x = 606,667.94
  5. Step 5: Solve for x
    x = 606,667.94/845.93
  6. Step 6: Final answer
    x = 717.16

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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.