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Finding the Fourth Proportional to 218,959.40, 328,568.70 and 144,295.40

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Solution

The fourth proportional to 218,959.40, 328,568.70 and 144,295.40 is: 216,528.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,959.40 : 328,568.70 = 144,295.40 : x
  2. Step 2: Convert to fraction form
    218,959.40/328,568.70 = 144,295.40/x
  3. Step 3: Cross multiply
    218,959.40x = 328,568.70 × 144,295.40
  4. Step 4: Simplify right side
    218,959.40x = 47,410,951,993.98
  5. Step 5: Solve for x
    x = 47,410,951,993.98/218,959.40
  6. Step 6: Final answer
    x = 216,528.51

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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.