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Finding the Fourth Proportional to 218,900.80, 328,610.40 and 217,345.60

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Solution

The fourth proportional to 218,900.80, 328,610.40 and 217,345.60 is: 326,275.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,900.80 : 328,610.40 = 217,345.60 : x
  2. Step 2: Convert to fraction form
    218,900.80/328,610.40 = 217,345.60/x
  3. Step 3: Cross multiply
    218,900.80x = 328,610.40 × 217,345.60
  4. Step 4: Simplify right side
    218,900.80x = 71,422,024,554.24
  5. Step 5: Solve for x
    x = 71,422,024,554.24/218,900.80
  6. Step 6: Final answer
    x = 326,275.76

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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.