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Finding the Fourth Proportional to 1,944.40, 2,914.36 and 971.20

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Solution

The fourth proportional to 1,944.40, 2,914.36 and 971.20 is: 1,455.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,944.40 : 2,914.36 = 971.20 : x
  2. Step 2: Convert to fraction form
    1,944.40/2,914.36 = 971.20/x
  3. Step 3: Cross multiply
    1,944.40x = 2,914.36 × 971.20
  4. Step 4: Simplify right side
    1,944.40x = 2,830,426.43
  5. Step 5: Solve for x
    x = 2,830,426.43/1,944.40
  6. Step 6: Final answer
    x = 1,455.68

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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.