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Finding the Fourth Proportional to 2,077.70, 3,116.68 and 690.98

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Solution

The fourth proportional to 2,077.70, 3,116.68 and 690.98 is: 1,036.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,077.70 : 3,116.68 = 690.98 : x
  2. Step 2: Convert to fraction form
    2,077.70/3,116.68 = 690.98/x
  3. Step 3: Cross multiply
    2,077.70x = 3,116.68 × 690.98
  4. Step 4: Simplify right side
    2,077.70x = 2,153,546.24
  5. Step 5: Solve for x
    x = 2,153,546.24/2,077.70
  6. Step 6: Final answer
    x = 1,036.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.