Home / 1,240.08-1,860.18-407.07

Finding the Fourth Proportional to 1,240.08, 1,860.18 and 407.07

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Solution

The fourth proportional to 1,240.08, 1,860.18 and 407.07 is: 610.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,240.08 : 1,860.18 = 407.07 : x
  2. Step 2: Convert to fraction form
    1,240.08/1,860.18 = 407.07/x
  3. Step 3: Cross multiply
    1,240.08x = 1,860.18 × 407.07
  4. Step 4: Simplify right side
    1,240.08x = 757,212.14
  5. Step 5: Solve for x
    x = 757,212.14/1,240.08
  6. Step 6: Final answer
    x = 610.62

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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.