Home / 1,540.05-2,125.40-877.11

Finding the Fourth Proportional to 1,540.05, 2,125.40 and 877.11

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Solution

The fourth proportional to 1,540.05, 2,125.40 and 877.11 is: 1,210.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.05 : 2,125.40 = 877.11 : x
  2. Step 2: Convert to fraction form
    1,540.05/2,125.40 = 877.11/x
  3. Step 3: Cross multiply
    1,540.05x = 2,125.40 × 877.11
  4. Step 4: Simplify right side
    1,540.05x = 1,864,205.21
  5. Step 5: Solve for x
    x = 1,864,205.21/1,540.05
  6. Step 6: Final answer
    x = 1,210.48

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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.