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Finding the Fourth Proportional to 986.56, 1,360.98 and 632.31

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Solution

The fourth proportional to 986.56, 1,360.98 and 632.31 is: 872.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.56 : 1,360.98 = 632.31 : x
  2. Step 2: Convert to fraction form
    986.56/1,360.98 = 632.31/x
  3. Step 3: Cross multiply
    986.56x = 1,360.98 × 632.31
  4. Step 4: Simplify right side
    986.56x = 860,561.26
  5. Step 5: Solve for x
    x = 860,561.26/986.56
  6. Step 6: Final answer
    x = 872.28

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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.