Home / 1,605.12-2,215.32-1,015.92

Finding the Fourth Proportional to 1,605.12, 2,215.32 and 1,015.92

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Solution

The fourth proportional to 1,605.12, 2,215.32 and 1,015.92 is: 1,402.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,605.12 : 2,215.32 = 1,015.92 : x
  2. Step 2: Convert to fraction form
    1,605.12/2,215.32 = 1,015.92/x
  3. Step 3: Cross multiply
    1,605.12x = 2,215.32 × 1,015.92
  4. Step 4: Simplify right side
    1,605.12x = 2,250,587.89
  5. Step 5: Solve for x
    x = 2,250,587.89/1,605.12
  6. Step 6: Final answer
    x = 1,402.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.