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Finding the Fourth Proportional to 1,982.74, 2,973.88 and 522

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Solution

The fourth proportional to 1,982.74, 2,973.88 and 522 is: 782.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.74 : 2,973.88 = 522 : x
  2. Step 2: Convert to fraction form
    1,982.74/2,973.88 = 522/x
  3. Step 3: Cross multiply
    1,982.74x = 2,973.88 × 522
  4. Step 4: Simplify right side
    1,982.74x = 1,552,365.36
  5. Step 5: Solve for x
    x = 1,552,365.36/1,982.74
  6. Step 6: Final answer
    x = 782.94

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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.