Home / 3,917.64-5,875.18-1,320.20

Finding the Fourth Proportional to 3,917.64, 5,875.18 and 1,320.20

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Solution

The fourth proportional to 3,917.64, 5,875.18 and 1,320.20 is: 1,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.64 : 5,875.18 = 1,320.20 : x
  2. Step 2: Convert to fraction form
    3,917.64/5,875.18 = 1,320.20/x
  3. Step 3: Cross multiply
    3,917.64x = 5,875.18 × 1,320.20
  4. Step 4: Simplify right side
    3,917.64x = 7,756,412.64
  5. Step 5: Solve for x
    x = 7,756,412.64/3,917.64
  6. Step 6: Final answer
    x = 1,979.87

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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.