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Finding the Fourth Proportional to 1,977.54, 2,965.31 and 660.83

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Solution

The fourth proportional to 1,977.54, 2,965.31 and 660.83 is: 990.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.54 : 2,965.31 = 660.83 : x
  2. Step 2: Convert to fraction form
    1,977.54/2,965.31 = 660.83/x
  3. Step 3: Cross multiply
    1,977.54x = 2,965.31 × 660.83
  4. Step 4: Simplify right side
    1,977.54x = 1,959,547.68
  5. Step 5: Solve for x
    x = 1,959,547.68/1,977.54
  6. Step 6: Final answer
    x = 990.90

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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.