Home / 2,391.12-3,587.88-1,620

Finding the Fourth Proportional to 2,391.12, 3,587.88 and 1,620

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Solution

The fourth proportional to 2,391.12, 3,587.88 and 1,620 is: 2,430.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,391.12 : 3,587.88 = 1,620 : x
  2. Step 2: Convert to fraction form
    2,391.12/3,587.88 = 1,620/x
  3. Step 3: Cross multiply
    2,391.12x = 3,587.88 × 1,620
  4. Step 4: Simplify right side
    2,391.12x = 5,812,365.60
  5. Step 5: Solve for x
    x = 5,812,365.60/2,391.12
  6. Step 6: Final answer
    x = 2,430.81

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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.