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Finding the Fourth Proportional to 1,340.89, 2,011.88 and 609.73

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Solution

The fourth proportional to 1,340.89, 2,011.88 and 609.73 is: 914.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.89 : 2,011.88 = 609.73 : x
  2. Step 2: Convert to fraction form
    1,340.89/2,011.88 = 609.73/x
  3. Step 3: Cross multiply
    1,340.89x = 2,011.88 × 609.73
  4. Step 4: Simplify right side
    1,340.89x = 1,226,703.59
  5. Step 5: Solve for x
    x = 1,226,703.59/1,340.89
  6. Step 6: Final answer
    x = 914.84

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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.