Home / 1,555.11-2,145.20-965.52

Finding the Fourth Proportional to 1,555.11, 2,145.20 and 965.52

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Solution

The fourth proportional to 1,555.11, 2,145.20 and 965.52 is: 1,331.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.11 : 2,145.20 = 965.52 : x
  2. Step 2: Convert to fraction form
    1,555.11/2,145.20 = 965.52/x
  3. Step 3: Cross multiply
    1,555.11x = 2,145.20 × 965.52
  4. Step 4: Simplify right side
    1,555.11x = 2,071,228.68
  5. Step 5: Solve for x
    x = 2,071,228.68/1,555.11
  6. Step 6: Final answer
    x = 1,331.89

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1.5x scale

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.