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Finding the Fourth Proportional to 218,803.60, 328,205.40 and 163,507.60

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Solution

The fourth proportional to 218,803.60, 328,205.40 and 163,507.60 is: 245,261.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,803.60 : 328,205.40 = 163,507.60 : x
  2. Step 2: Convert to fraction form
    218,803.60/328,205.40 = 163,507.60/x
  3. Step 3: Cross multiply
    218,803.60x = 328,205.40 × 163,507.60
  4. Step 4: Simplify right side
    218,803.60x = 53,664,077,261.04
  5. Step 5: Solve for x
    x = 53,664,077,261.04/218,803.60
  6. Step 6: Final answer
    x = 245,261.40

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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.