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Finding the Fourth Proportional to 987.54, 1,362.73 and 609.37

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Solution

The fourth proportional to 987.54, 1,362.73 and 609.37 is: 840.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    987.54 : 1,362.73 = 609.37 : x
  2. Step 2: Convert to fraction form
    987.54/1,362.73 = 609.37/x
  3. Step 3: Cross multiply
    987.54x = 1,362.73 × 609.37
  4. Step 4: Simplify right side
    987.54x = 830,399.97
  5. Step 5: Solve for x
    x = 830,399.97/987.54
  6. Step 6: Final answer
    x = 840.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.