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Finding the Fourth Proportional to 712.99, 1,068.76 and 481.90

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Solution

The fourth proportional to 712.99, 1,068.76 and 481.90 is: 722.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.99 : 1,068.76 = 481.90 : x
  2. Step 2: Convert to fraction form
    712.99/1,068.76 = 481.90/x
  3. Step 3: Cross multiply
    712.99x = 1,068.76 × 481.90
  4. Step 4: Simplify right side
    712.99x = 515,036.88
  5. Step 5: Solve for x
    x = 515,036.88/712.99
  6. Step 6: Final answer
    x = 722.36

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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.