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Finding the Fourth Proportional to 679,878.80, 1,019,915.40 and 230,620.40

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Solution

The fourth proportional to 679,878.80, 1,019,915.40 and 230,620.40 is: 345,963.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,878.80 : 1,019,915.40 = 230,620.40 : x
  2. Step 2: Convert to fraction form
    679,878.80/1,019,915.40 = 230,620.40/x
  3. Step 3: Cross multiply
    679,878.80x = 1,019,915.40 × 230,620.40
  4. Step 4: Simplify right side
    679,878.80x = 235,213,297,514.16
  5. Step 5: Solve for x
    x = 235,213,297,514.16/679,878.80
  6. Step 6: Final answer
    x = 345,963.57

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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.