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Finding the Fourth Proportional to 680,930.40, 1,021,978.80 and 302,433.60

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Solution

The fourth proportional to 680,930.40, 1,021,978.80 and 302,433.60 is: 453,909.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,930.40 : 1,021,978.80 = 302,433.60 : x
  2. Step 2: Convert to fraction form
    680,930.40/1,021,978.80 = 302,433.60/x
  3. Step 3: Cross multiply
    680,930.40x = 1,021,978.80 × 302,433.60
  4. Step 4: Simplify right side
    680,930.40x = 309,080,727,607.68
  5. Step 5: Solve for x
    x = 309,080,727,607.68/680,930.40
  6. Step 6: Final answer
    x = 453,909.43

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.