Home / 1,428.01-1,971.54-1,095.80

Finding the Fourth Proportional to 1,428.01, 1,971.54 and 1,095.80

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Solution

The fourth proportional to 1,428.01, 1,971.54 and 1,095.80 is: 1,512.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.01 : 1,971.54 = 1,095.80 : x
  2. Step 2: Convert to fraction form
    1,428.01/1,971.54 = 1,095.80/x
  3. Step 3: Cross multiply
    1,428.01x = 1,971.54 × 1,095.80
  4. Step 4: Simplify right side
    1,428.01x = 2,160,403.67
  5. Step 5: Solve for x
    x = 2,160,403.67/1,428.01
  6. Step 6: Final answer
    x = 1,512.88

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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.