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Finding the Fourth Proportional to 887.98, 1,329.96 and 612.82

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Solution

The fourth proportional to 887.98, 1,329.96 and 612.82 is: 917.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.98 : 1,329.96 = 612.82 : x
  2. Step 2: Convert to fraction form
    887.98/1,329.96 = 612.82/x
  3. Step 3: Cross multiply
    887.98x = 1,329.96 × 612.82
  4. Step 4: Simplify right side
    887.98x = 815,026.09
  5. Step 5: Solve for x
    x = 815,026.09/887.98
  6. Step 6: Final answer
    x = 917.84

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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.