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Finding the Fourth Proportional to 986.38, 1,360.44 and 632.34

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Solution

The fourth proportional to 986.38, 1,360.44 and 632.34 is: 872.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.38 : 1,360.44 = 632.34 : x
  2. Step 2: Convert to fraction form
    986.38/1,360.44 = 632.34/x
  3. Step 3: Cross multiply
    986.38x = 1,360.44 × 632.34
  4. Step 4: Simplify right side
    986.38x = 860,253.16
  5. Step 5: Solve for x
    x = 860,253.16/986.38
  6. Step 6: Final answer
    x = 872.13

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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.