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Finding the Fourth Proportional to 1,813.58, 2,720.76 and 659.34

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Solution

The fourth proportional to 1,813.58, 2,720.76 and 659.34 is: 989.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.58 : 2,720.76 = 659.34 : x
  2. Step 2: Convert to fraction form
    1,813.58/2,720.76 = 659.34/x
  3. Step 3: Cross multiply
    1,813.58x = 2,720.76 × 659.34
  4. Step 4: Simplify right side
    1,813.58x = 1,793,905.90
  5. Step 5: Solve for x
    x = 1,793,905.90/1,813.58
  6. Step 6: Final answer
    x = 989.15

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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.