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Finding the Fourth Proportional to 1,972.25, 2,959.99 and 998.63

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Solution

The fourth proportional to 1,972.25, 2,959.99 and 998.63 is: 1,498.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,972.25 : 2,959.99 = 998.63 : x
  2. Step 2: Convert to fraction form
    1,972.25/2,959.99 = 998.63/x
  3. Step 3: Cross multiply
    1,972.25x = 2,959.99 × 998.63
  4. Step 4: Simplify right side
    1,972.25x = 2,955,915.02
  5. Step 5: Solve for x
    x = 2,955,915.02/1,972.25
  6. Step 6: Final answer
    x = 1,498.76

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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.