Home / 1,340.34-2,009.94-415.70

Finding the Fourth Proportional to 1,340.34, 2,009.94 and 415.70

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Solution

The fourth proportional to 1,340.34, 2,009.94 and 415.70 is: 623.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340.34 : 2,009.94 = 415.70 : x
  2. Step 2: Convert to fraction form
    1,340.34/2,009.94 = 415.70/x
  3. Step 3: Cross multiply
    1,340.34x = 2,009.94 × 415.70
  4. Step 4: Simplify right side
    1,340.34x = 835,532.06
  5. Step 5: Solve for x
    x = 835,532.06/1,340.34
  6. Step 6: Final answer
    x = 623.37

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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.