Home / 1,445.09-2,167.77-405.09

Finding the Fourth Proportional to 1,445.09, 2,167.77 and 405.09

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Solution

The fourth proportional to 1,445.09, 2,167.77 and 405.09 is: 607.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.09 : 2,167.77 = 405.09 : x
  2. Step 2: Convert to fraction form
    1,445.09/2,167.77 = 405.09/x
  3. Step 3: Cross multiply
    1,445.09x = 2,167.77 × 405.09
  4. Step 4: Simplify right side
    1,445.09x = 878,143.47
  5. Step 5: Solve for x
    x = 878,143.47/1,445.09
  6. Step 6: Final answer
    x = 607.68

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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.