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Finding the Fourth Proportional to 219,487.80, 329,034.60 and 86,458.80

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Solution

The fourth proportional to 219,487.80, 329,034.60 and 86,458.80 is: 129,610.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,487.80 : 329,034.60 = 86,458.80 : x
  2. Step 2: Convert to fraction form
    219,487.80/329,034.60 = 86,458.80/x
  3. Step 3: Cross multiply
    219,487.80x = 329,034.60 × 86,458.80
  4. Step 4: Simplify right side
    219,487.80x = 28,447,936,674.48
  5. Step 5: Solve for x
    x = 28,447,936,674.48/219,487.80
  6. Step 6: Final answer
    x = 129,610.56

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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.