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Finding the Fourth Proportional to 1,776.79, 2,451.99 and 990.89

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Solution

The fourth proportional to 1,776.79, 2,451.99 and 990.89 is: 1,367.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.79 : 2,451.99 = 990.89 : x
  2. Step 2: Convert to fraction form
    1,776.79/2,451.99 = 990.89/x
  3. Step 3: Cross multiply
    1,776.79x = 2,451.99 × 990.89
  4. Step 4: Simplify right side
    1,776.79x = 2,429,635.16
  5. Step 5: Solve for x
    x = 2,429,635.16/1,776.79
  6. Step 6: Final answer
    x = 1,367.43

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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.