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Finding the Fourth Proportional to 829.51, 1,244.75 and 309.88

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Solution

The fourth proportional to 829.51, 1,244.75 and 309.88 is: 465.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    829.51 : 1,244.75 = 309.88 : x
  2. Step 2: Convert to fraction form
    829.51/1,244.75 = 309.88/x
  3. Step 3: Cross multiply
    829.51x = 1,244.75 × 309.88
  4. Step 4: Simplify right side
    829.51x = 385,720.79
  5. Step 5: Solve for x
    x = 385,720.79/829.51
  6. Step 6: Final answer
    x = 465.00

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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.