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Finding the Fourth Proportional to 679,348.80, 1,019,032.80 and 258,647.68

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Solution

The fourth proportional to 679,348.80, 1,019,032.80 and 258,647.68 is: 387,975.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,348.80 : 1,019,032.80 = 258,647.68 : x
  2. Step 2: Convert to fraction form
    679,348.80/1,019,032.80 = 258,647.68/x
  3. Step 3: Cross multiply
    679,348.80x = 1,019,032.80 × 258,647.68
  4. Step 4: Simplify right side
    679,348.80x = 263,570,469,563.90
  5. Step 5: Solve for x
    x = 263,570,469,563.90/679,348.80
  6. Step 6: Final answer
    x = 387,975.17

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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.