Home / 3,780.81-5,215.45-2,415.52

Finding the Fourth Proportional to 3,780.81, 5,215.45 and 2,415.52

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Solution

The fourth proportional to 3,780.81, 5,215.45 and 2,415.52 is: 3,332.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,780.81 : 5,215.45 = 2,415.52 : x
  2. Step 2: Convert to fraction form
    3,780.81/5,215.45 = 2,415.52/x
  3. Step 3: Cross multiply
    3,780.81x = 5,215.45 × 2,415.52
  4. Step 4: Simplify right side
    3,780.81x = 12,598,023.78
  5. Step 5: Solve for x
    x = 12,598,023.78/3,780.81
  6. Step 6: Final answer
    x = 3,332.10

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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.