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Finding the Fourth Proportional to 679,425.60, 1,018,879.20 and 205,953.60

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Solution

The fourth proportional to 679,425.60, 1,018,879.20 and 205,953.60 is: 308,851.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,425.60 : 1,018,879.20 = 205,953.60 : x
  2. Step 2: Convert to fraction form
    679,425.60/1,018,879.20 = 205,953.60/x
  3. Step 3: Cross multiply
    679,425.60x = 1,018,879.20 × 205,953.60
  4. Step 4: Simplify right side
    679,425.60x = 209,841,839,205.12
  5. Step 5: Solve for x
    x = 209,841,839,205.12/679,425.60
  6. Step 6: Final answer
    x = 308,851.83

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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.