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Finding the Fourth Proportional to 1,971.74, 2,959.23 and 998.12

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Solution

The fourth proportional to 1,971.74, 2,959.23 and 998.12 is: 1,498.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.74 : 2,959.23 = 998.12 : x
  2. Step 2: Convert to fraction form
    1,971.74/2,959.23 = 998.12/x
  3. Step 3: Cross multiply
    1,971.74x = 2,959.23 × 998.12
  4. Step 4: Simplify right side
    1,971.74x = 2,953,677.79
  5. Step 5: Solve for x
    x = 2,953,677.79/1,971.74
  6. Step 6: Final answer
    x = 1,498.00

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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.