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Finding the Fourth Proportional to 846.43, 1,268.54 and 612.95

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Solution

The fourth proportional to 846.43, 1,268.54 and 612.95 is: 918.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    846.43 : 1,268.54 = 612.95 : x
  2. Step 2: Convert to fraction form
    846.43/1,268.54 = 612.95/x
  3. Step 3: Cross multiply
    846.43x = 1,268.54 × 612.95
  4. Step 4: Simplify right side
    846.43x = 777,551.59
  5. Step 5: Solve for x
    x = 777,551.59/846.43
  6. Step 6: Final answer
    x = 918.62

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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.