Home / 1,640.45-2,460.60-407.84

Finding the Fourth Proportional to 1,640.45, 2,460.60 and 407.84

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Solution

The fourth proportional to 1,640.45, 2,460.60 and 407.84 is: 611.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.45 : 2,460.60 = 407.84 : x
  2. Step 2: Convert to fraction form
    1,640.45/2,460.60 = 407.84/x
  3. Step 3: Cross multiply
    1,640.45x = 2,460.60 × 407.84
  4. Step 4: Simplify right side
    1,640.45x = 1,003,518.80
  5. Step 5: Solve for x
    x = 1,003,518.80/1,640.45
  6. Step 6: Final answer
    x = 611.74

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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.