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Finding the Fourth Proportional to 218,812.80, 328,219.20 and 201,705.60

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Solution

The fourth proportional to 218,812.80, 328,219.20 and 201,705.60 is: 302,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,812.80 : 328,219.20 = 201,705.60 : x
  2. Step 2: Convert to fraction form
    218,812.80/328,219.20 = 201,705.60/x
  3. Step 3: Cross multiply
    218,812.80x = 328,219.20 × 201,705.60
  4. Step 4: Simplify right side
    218,812.80x = 66,203,650,667.52
  5. Step 5: Solve for x
    x = 66,203,650,667.52/218,812.80
  6. Step 6: Final answer
    x = 302,558.40

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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.