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Finding the Fourth Proportional to 1,982.65, 2,973.73 and 521.91

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Solution

The fourth proportional to 1,982.65, 2,973.73 and 521.91 is: 782.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.65 : 2,973.73 = 521.91 : x
  2. Step 2: Convert to fraction form
    1,982.65/2,973.73 = 521.91/x
  3. Step 3: Cross multiply
    1,982.65x = 2,973.73 × 521.91
  4. Step 4: Simplify right side
    1,982.65x = 1,552,024.01
  5. Step 5: Solve for x
    x = 1,552,024.01/1,982.65
  6. Step 6: Final answer
    x = 782.80

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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.