Home / 1,272.03-1,904.28-1,242.20

Finding the Fourth Proportional to 1,272.03, 1,904.28 and 1,242.20

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Solution

The fourth proportional to 1,272.03, 1,904.28 and 1,242.20 is: 1,859.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272.03 : 1,904.28 = 1,242.20 : x
  2. Step 2: Convert to fraction form
    1,272.03/1,904.28 = 1,242.20/x
  3. Step 3: Cross multiply
    1,272.03x = 1,904.28 × 1,242.20
  4. Step 4: Simplify right side
    1,272.03x = 2,365,487.09
  5. Step 5: Solve for x
    x = 2,365,487.09/1,272.03
  6. Step 6: Final answer
    x = 1,859.62

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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.