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Finding the Fourth Proportional to 1,992.24, 2,988.59 and 531.45

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Solution

The fourth proportional to 1,992.24, 2,988.59 and 531.45 is: 797.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.24 : 2,988.59 = 531.45 : x
  2. Step 2: Convert to fraction form
    1,992.24/2,988.59 = 531.45/x
  3. Step 3: Cross multiply
    1,992.24x = 2,988.59 × 531.45
  4. Step 4: Simplify right side
    1,992.24x = 1,588,283.50
  5. Step 5: Solve for x
    x = 1,588,283.50/1,992.24
  6. Step 6: Final answer
    x = 797.24

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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.