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Finding the Fourth Proportional to 983.37, 1,356.81 and 624.33

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Solution

The fourth proportional to 983.37, 1,356.81 and 624.33 is: 861.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.37 : 1,356.81 = 624.33 : x
  2. Step 2: Convert to fraction form
    983.37/1,356.81 = 624.33/x
  3. Step 3: Cross multiply
    983.37x = 1,356.81 × 624.33
  4. Step 4: Simplify right side
    983.37x = 847,094.85
  5. Step 5: Solve for x
    x = 847,094.85/983.37
  6. Step 6: Final answer
    x = 861.42

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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.