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Finding the Fourth Proportional to 3,579.44, 5,368.20 and 981.76

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Solution

The fourth proportional to 3,579.44, 5,368.20 and 981.76 is: 1,472.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,579.44 : 5,368.20 = 981.76 : x
  2. Step 2: Convert to fraction form
    3,579.44/5,368.20 = 981.76/x
  3. Step 3: Cross multiply
    3,579.44x = 5,368.20 × 981.76
  4. Step 4: Simplify right side
    3,579.44x = 5,270,284.03
  5. Step 5: Solve for x
    x = 5,270,284.03/3,579.44
  6. Step 6: Final answer
    x = 1,472.38

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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.