Home / 3,929.72-5,890.88-1,330.84

Finding the Fourth Proportional to 3,929.72, 5,890.88 and 1,330.84

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Solution

The fourth proportional to 3,929.72, 5,890.88 and 1,330.84 is: 1,995.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.72 : 5,890.88 = 1,330.84 : x
  2. Step 2: Convert to fraction form
    3,929.72/5,890.88 = 1,330.84/x
  3. Step 3: Cross multiply
    3,929.72x = 5,890.88 × 1,330.84
  4. Step 4: Simplify right side
    3,929.72x = 7,839,818.74
  5. Step 5: Solve for x
    x = 7,839,818.74/3,929.72
  6. Step 6: Final answer
    x = 1,995.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.