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Finding the Fourth Proportional to 1,188.62, 1,782.52 and 458.13

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Solution

The fourth proportional to 1,188.62, 1,782.52 and 458.13 is: 687.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.62 : 1,782.52 = 458.13 : x
  2. Step 2: Convert to fraction form
    1,188.62/1,782.52 = 458.13/x
  3. Step 3: Cross multiply
    1,188.62x = 1,782.52 × 458.13
  4. Step 4: Simplify right side
    1,188.62x = 816,624.74
  5. Step 5: Solve for x
    x = 816,624.74/1,188.62
  6. Step 6: Final answer
    x = 687.04

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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.