Home / 2,142.40-2,955.66-1,345.25

Finding the Fourth Proportional to 2,142.40, 2,955.66 and 1,345.25

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Solution

The fourth proportional to 2,142.40, 2,955.66 and 1,345.25 is: 1,855.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.40 : 2,955.66 = 1,345.25 : x
  2. Step 2: Convert to fraction form
    2,142.40/2,955.66 = 1,345.25/x
  3. Step 3: Cross multiply
    2,142.40x = 2,955.66 × 1,345.25
  4. Step 4: Simplify right side
    2,142.40x = 3,976,101.62
  5. Step 5: Solve for x
    x = 3,976,101.62/2,142.40
  6. Step 6: Final answer
    x = 1,855.91

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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.