Home / 2,178.75-3,006.28-1,515.36

Finding the Fourth Proportional to 2,178.75, 3,006.28 and 1,515.36

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Solution

The fourth proportional to 2,178.75, 3,006.28 and 1,515.36 is: 2,090.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.75 : 3,006.28 = 1,515.36 : x
  2. Step 2: Convert to fraction form
    2,178.75/3,006.28 = 1,515.36/x
  3. Step 3: Cross multiply
    2,178.75x = 3,006.28 × 1,515.36
  4. Step 4: Simplify right side
    2,178.75x = 4,555,596.46
  5. Step 5: Solve for x
    x = 4,555,596.46/2,178.75
  6. Step 6: Final answer
    x = 2,090.92

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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.