Home / 1,340.60-2,011.05-415.94

Finding the Fourth Proportional to 1,340.60, 2,011.05 and 415.94

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Solution

The fourth proportional to 1,340.60, 2,011.05 and 415.94 is: 623.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.60 : 2,011.05 = 415.94 : x
  2. Step 2: Convert to fraction form
    1,340.60/2,011.05 = 415.94/x
  3. Step 3: Cross multiply
    1,340.60x = 2,011.05 × 415.94
  4. Step 4: Simplify right side
    1,340.60x = 836,476.14
  5. Step 5: Solve for x
    x = 836,476.14/1,340.60
  6. Step 6: Final answer
    x = 623.96

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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.