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Finding the Fourth Proportional to 829.76, 1,245.88 and 465.28

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Solution

The fourth proportional to 829.76, 1,245.88 and 465.28 is: 698.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.76 : 1,245.88 = 465.28 : x
  2. Step 2: Convert to fraction form
    829.76/1,245.88 = 465.28/x
  3. Step 3: Cross multiply
    829.76x = 1,245.88 × 465.28
  4. Step 4: Simplify right side
    829.76x = 579,683.05
  5. Step 5: Solve for x
    x = 579,683.05/829.76
  6. Step 6: Final answer
    x = 698.62

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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.