Home / 1,971.30-2,720.53-1,087.11

Finding the Fourth Proportional to 1,971.30, 2,720.53 and 1,087.11

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Solution

The fourth proportional to 1,971.30, 2,720.53 and 1,087.11 is: 1,500.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.30 : 2,720.53 = 1,087.11 : x
  2. Step 2: Convert to fraction form
    1,971.30/2,720.53 = 1,087.11/x
  3. Step 3: Cross multiply
    1,971.30x = 2,720.53 × 1,087.11
  4. Step 4: Simplify right side
    1,971.30x = 2,957,510.61
  5. Step 5: Solve for x
    x = 2,957,510.61/1,971.30
  6. Step 6: Final answer
    x = 1,500.28

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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.