Home / 1,947.92-2,918.88-1,322.40

Finding the Fourth Proportional to 1,947.92, 2,918.88 and 1,322.40

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Solution

The fourth proportional to 1,947.92, 2,918.88 and 1,322.40 is: 1,981.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,947.92 : 2,918.88 = 1,322.40 : x
  2. Step 2: Convert to fraction form
    1,947.92/2,918.88 = 1,322.40/x
  3. Step 3: Cross multiply
    1,947.92x = 2,918.88 × 1,322.40
  4. Step 4: Simplify right side
    1,947.92x = 3,859,937.86
  5. Step 5: Solve for x
    x = 3,859,937.86/1,947.92
  6. Step 6: Final answer
    x = 1,981.57

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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.