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Finding the Fourth Proportional to 1,188.96, 1,784.16 and 458.61

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Solution

The fourth proportional to 1,188.96, 1,784.16 and 458.61 is: 688.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.96 : 1,784.16 = 458.61 : x
  2. Step 2: Convert to fraction form
    1,188.96/1,784.16 = 458.61/x
  3. Step 3: Cross multiply
    1,188.96x = 1,784.16 × 458.61
  4. Step 4: Simplify right side
    1,188.96x = 818,233.62
  5. Step 5: Solve for x
    x = 818,233.62/1,188.96
  6. Step 6: Final answer
    x = 688.19

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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.