Home / 1,340.28-2,010.61-415.91

Finding the Fourth Proportional to 1,340.28, 2,010.61 and 415.91

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Solution

The fourth proportional to 1,340.28, 2,010.61 and 415.91 is: 623.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.28 : 2,010.61 = 415.91 : x
  2. Step 2: Convert to fraction form
    1,340.28/2,010.61 = 415.91/x
  3. Step 3: Cross multiply
    1,340.28x = 2,010.61 × 415.91
  4. Step 4: Simplify right side
    1,340.28x = 836,230.36
  5. Step 5: Solve for x
    x = 836,230.36/1,340.28
  6. Step 6: Final answer
    x = 623.92

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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.