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Finding the Fourth Proportional to 1,776.44, 2,451.40 and 990.34

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Solution

The fourth proportional to 1,776.44, 2,451.40 and 990.34 is: 1,366.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.44 : 2,451.40 = 990.34 : x
  2. Step 2: Convert to fraction form
    1,776.44/2,451.40 = 990.34/x
  3. Step 3: Cross multiply
    1,776.44x = 2,451.40 × 990.34
  4. Step 4: Simplify right side
    1,776.44x = 2,427,719.48
  5. Step 5: Solve for x
    x = 2,427,719.48/1,776.44
  6. Step 6: Final answer
    x = 1,366.62

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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.