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Finding the Fourth Proportional to 859.18, 1,289.52 and 494.22

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Solution

The fourth proportional to 859.18, 1,289.52 and 494.22 is: 741.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    859.18 : 1,289.52 = 494.22 : x
  2. Step 2: Convert to fraction form
    859.18/1,289.52 = 494.22/x
  3. Step 3: Cross multiply
    859.18x = 1,289.52 × 494.22
  4. Step 4: Simplify right side
    859.18x = 637,306.57
  5. Step 5: Solve for x
    x = 637,306.57/859.18
  6. Step 6: Final answer
    x = 741.76

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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.