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Finding the Fourth Proportional to 1,611.12, 2,416.68 and 456.88

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Solution

The fourth proportional to 1,611.12, 2,416.68 and 456.88 is: 685.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.12 : 2,416.68 = 456.88 : x
  2. Step 2: Convert to fraction form
    1,611.12/2,416.68 = 456.88/x
  3. Step 3: Cross multiply
    1,611.12x = 2,416.68 × 456.88
  4. Step 4: Simplify right side
    1,611.12x = 1,104,132.76
  5. Step 5: Solve for x
    x = 1,104,132.76/1,611.12
  6. Step 6: Final answer
    x = 685.32

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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.