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Finding the Fourth Proportional to 1,970.44, 2,715.92 and 1,690.96

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Solution

The fourth proportional to 1,970.44, 2,715.92 and 1,690.96 is: 2,330.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,970.44 : 2,715.92 = 1,690.96 : x
  2. Step 2: Convert to fraction form
    1,970.44/2,715.92 = 1,690.96/x
  3. Step 3: Cross multiply
    1,970.44x = 2,715.92 × 1,690.96
  4. Step 4: Simplify right side
    1,970.44x = 4,592,512.08
  5. Step 5: Solve for x
    x = 4,592,512.08/1,970.44
  6. Step 6: Final answer
    x = 2,330.70

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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.