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Finding the Fourth Proportional to 218,485.80, 306,502.20 and 218,485.80

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Solution

The fourth proportional to 218,485.80, 306,502.20 and 218,485.80 is: 306,502.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,485.80 : 306,502.20 = 218,485.80 : x
  2. Step 2: Convert to fraction form
    218,485.80/306,502.20 = 218,485.80/x
  3. Step 3: Cross multiply
    218,485.80x = 306,502.20 × 218,485.80
  4. Step 4: Simplify right side
    218,485.80x = 66,966,378,368.76
  5. Step 5: Solve for x
    x = 66,966,378,368.76/218,485.80
  6. Step 6: Final answer
    x = 306,502.20

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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.