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Finding the Fourth Proportional to 998.56, 1,497.36 and 607.84

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Solution

The fourth proportional to 998.56, 1,497.36 and 607.84 is: 911.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    998.56 : 1,497.36 = 607.84 : x
  2. Step 2: Convert to fraction form
    998.56/1,497.36 = 607.84/x
  3. Step 3: Cross multiply
    998.56x = 1,497.36 × 607.84
  4. Step 4: Simplify right side
    998.56x = 910,155.30
  5. Step 5: Solve for x
    x = 910,155.30/998.56
  6. Step 6: Final answer
    x = 911.47

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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.