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Finding the Fourth Proportional to 218,715.40, 306,512.60 and 218,715.40

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Solution

The fourth proportional to 218,715.40, 306,512.60 and 218,715.40 is: 306,512.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,715.40 : 306,512.60 = 218,715.40 : x
  2. Step 2: Convert to fraction form
    218,715.40/306,512.60 = 218,715.40/x
  3. Step 3: Cross multiply
    218,715.40x = 306,512.60 × 218,715.40
  4. Step 4: Simplify right side
    218,715.40x = 67,039,025,914.04
  5. Step 5: Solve for x
    x = 67,039,025,914.04/218,715.40
  6. Step 6: Final answer
    x = 306,512.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.