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Finding the Fourth Proportional to 1,776.12, 2,450.88 and 990.18

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Solution

The fourth proportional to 1,776.12, 2,450.88 and 990.18 is: 1,366.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,776.12 : 2,450.88 = 990.18 : x
  2. Step 2: Convert to fraction form
    1,776.12/2,450.88 = 990.18/x
  3. Step 3: Cross multiply
    1,776.12x = 2,450.88 × 990.18
  4. Step 4: Simplify right side
    1,776.12x = 2,426,812.36
  5. Step 5: Solve for x
    x = 2,426,812.36/1,776.12
  6. Step 6: Final answer
    x = 1,366.36

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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.