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Finding the Fourth Proportional to 1,282.93, 1,770.47 and 723.41

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Solution

The fourth proportional to 1,282.93, 1,770.47 and 723.41 is: 998.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.93 : 1,770.47 = 723.41 : x
  2. Step 2: Convert to fraction form
    1,282.93/1,770.47 = 723.41/x
  3. Step 3: Cross multiply
    1,282.93x = 1,770.47 × 723.41
  4. Step 4: Simplify right side
    1,282.93x = 1,280,772.09
  5. Step 5: Solve for x
    x = 1,280,772.09/1,282.93
  6. Step 6: Final answer
    x = 998.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.