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Finding the Fourth Proportional to 1,395.02, 1,938.48 and 1,379.84

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Solution

The fourth proportional to 1,395.02, 1,938.48 and 1,379.84 is: 1,917.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,395.02 : 1,938.48 = 1,379.84 : x
  2. Step 2: Convert to fraction form
    1,395.02/1,938.48 = 1,379.84/x
  3. Step 3: Cross multiply
    1,395.02x = 1,938.48 × 1,379.84
  4. Step 4: Simplify right side
    1,395.02x = 2,674,785.14
  5. Step 5: Solve for x
    x = 2,674,785.14/1,395.02
  6. Step 6: Final answer
    x = 1,917.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.