Home / 218,917.60-328,376.40-163,621.60

Finding the Fourth Proportional to 218,917.60, 328,376.40 and 163,621.60

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Solution

The fourth proportional to 218,917.60, 328,376.40 and 163,621.60 is: 245,432.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,917.60 : 328,376.40 = 163,621.60 : x
  2. Step 2: Convert to fraction form
    218,917.60/328,376.40 = 163,621.60/x
  3. Step 3: Cross multiply
    218,917.60x = 328,376.40 × 163,621.60
  4. Step 4: Simplify right side
    218,917.60x = 53,729,471,970.24
  5. Step 5: Solve for x
    x = 53,729,471,970.24/218,917.60
  6. Step 6: Final answer
    x = 245,432.40

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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.