Home / 1,340.16-2,009.53-415.36

Finding the Fourth Proportional to 1,340.16, 2,009.53 and 415.36

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Solution

The fourth proportional to 1,340.16, 2,009.53 and 415.36 is: 622.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.16 : 2,009.53 = 415.36 : x
  2. Step 2: Convert to fraction form
    1,340.16/2,009.53 = 415.36/x
  3. Step 3: Cross multiply
    1,340.16x = 2,009.53 × 415.36
  4. Step 4: Simplify right side
    1,340.16x = 834,678.34
  5. Step 5: Solve for x
    x = 834,678.34/1,340.16
  6. Step 6: Final answer
    x = 622.82

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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.