Home / 1,605.18-2,408.10-912.18

Finding the Fourth Proportional to 1,605.18, 2,408.10 and 912.18

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Solution

The fourth proportional to 1,605.18, 2,408.10 and 912.18 is: 1,368.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.18 : 2,408.10 = 912.18 : x
  2. Step 2: Convert to fraction form
    1,605.18/2,408.10 = 912.18/x
  3. Step 3: Cross multiply
    1,605.18x = 2,408.10 × 912.18
  4. Step 4: Simplify right side
    1,605.18x = 2,196,620.66
  5. Step 5: Solve for x
    x = 2,196,620.66/1,605.18
  6. Step 6: Final answer
    x = 1,368.46

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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.