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Finding the Fourth Proportional to 988.43, 1,481.99 and 525.92

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Solution

The fourth proportional to 988.43, 1,481.99 and 525.92 is: 788.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    988.43 : 1,481.99 = 525.92 : x
  2. Step 2: Convert to fraction form
    988.43/1,481.99 = 525.92/x
  3. Step 3: Cross multiply
    988.43x = 1,481.99 × 525.92
  4. Step 4: Simplify right side
    988.43x = 779,398.14
  5. Step 5: Solve for x
    x = 779,398.14/988.43
  6. Step 6: Final answer
    x = 788.53

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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.