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Finding the Fourth Proportional to 1,280.84, 1,765.22 and 930.92

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Solution

The fourth proportional to 1,280.84, 1,765.22 and 930.92 is: 1,282.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.84 : 1,765.22 = 930.92 : x
  2. Step 2: Convert to fraction form
    1,280.84/1,765.22 = 930.92/x
  3. Step 3: Cross multiply
    1,280.84x = 1,765.22 × 930.92
  4. Step 4: Simplify right side
    1,280.84x = 1,643,278.60
  5. Step 5: Solve for x
    x = 1,643,278.60/1,280.84
  6. Step 6: Final answer
    x = 1,282.97

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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.