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Finding the Fourth Proportional to 1,776.66, 2,451.82 and 990.76

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Solution

The fourth proportional to 1,776.66, 2,451.82 and 990.76 is: 1,367.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.66 : 2,451.82 = 990.76 : x
  2. Step 2: Convert to fraction form
    1,776.66/2,451.82 = 990.76/x
  3. Step 3: Cross multiply
    1,776.66x = 2,451.82 × 990.76
  4. Step 4: Simplify right side
    1,776.66x = 2,429,165.18
  5. Step 5: Solve for x
    x = 2,429,165.18/1,776.66
  6. Step 6: Final answer
    x = 1,367.27

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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.