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Finding the Fourth Proportional to 859.68, 1,289.08 and 449.04

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Solution

The fourth proportional to 859.68, 1,289.08 and 449.04 is: 673.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.68 : 1,289.08 = 449.04 : x
  2. Step 2: Convert to fraction form
    859.68/1,289.08 = 449.04/x
  3. Step 3: Cross multiply
    859.68x = 1,289.08 × 449.04
  4. Step 4: Simplify right side
    859.68x = 578,848.48
  5. Step 5: Solve for x
    x = 578,848.48/859.68
  6. Step 6: Final answer
    x = 673.33

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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.