Home / 1,340.31-2,010.20-415.64

Finding the Fourth Proportional to 1,340.31, 2,010.20 and 415.64

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Solution

The fourth proportional to 1,340.31, 2,010.20 and 415.64 is: 623.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.31 : 2,010.20 = 415.64 : x
  2. Step 2: Convert to fraction form
    1,340.31/2,010.20 = 415.64/x
  3. Step 3: Cross multiply
    1,340.31x = 2,010.20 × 415.64
  4. Step 4: Simplify right side
    1,340.31x = 835,522.48
  5. Step 5: Solve for x
    x = 835,522.48/1,340.31
  6. Step 6: Final answer
    x = 623.38

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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.