Home / 2,947.64-4,421.72-1,216.40

Finding the Fourth Proportional to 2,947.64, 4,421.72 and 1,216.40

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Solution

The fourth proportional to 2,947.64, 4,421.72 and 1,216.40 is: 1,824.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,947.64 : 4,421.72 = 1,216.40 : x
  2. Step 2: Convert to fraction form
    2,947.64/4,421.72 = 1,216.40/x
  3. Step 3: Cross multiply
    2,947.64x = 4,421.72 × 1,216.40
  4. Step 4: Simplify right side
    2,947.64x = 5,378,561.14
  5. Step 5: Solve for x
    x = 5,378,561.14/2,947.64
  6. Step 6: Final answer
    x = 1,824.70

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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.