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Finding the Fourth Proportional to 328,101.20, 490,985.40 and 227,790.80

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Solution

The fourth proportional to 328,101.20, 490,985.40 and 227,790.80 is: 340,876.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,101.20 : 490,985.40 = 227,790.80 : x
  2. Step 2: Convert to fraction form
    328,101.20/490,985.40 = 227,790.80/x
  3. Step 3: Cross multiply
    328,101.20x = 490,985.40 × 227,790.80
  4. Step 4: Simplify right side
    328,101.20x = 111,841,957,054.32
  5. Step 5: Solve for x
    x = 111,841,957,054.32/328,101.20
  6. Step 6: Final answer
    x = 340,876.40

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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.