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Finding the Fourth Proportional to 1,282.77, 1,770.23 and 723.25

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Solution

The fourth proportional to 1,282.77, 1,770.23 and 723.25 is: 998.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,282.77 : 1,770.23 = 723.25 : x
  2. Step 2: Convert to fraction form
    1,282.77/1,770.23 = 723.25/x
  3. Step 3: Cross multiply
    1,282.77x = 1,770.23 × 723.25
  4. Step 4: Simplify right side
    1,282.77x = 1,280,318.85
  5. Step 5: Solve for x
    x = 1,280,318.85/1,282.77
  6. Step 6: Final answer
    x = 998.09

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1.5x scale

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.