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Finding the Fourth Proportional to 340,830.40, 511,245.60 and 191,531.20

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Solution

The fourth proportional to 340,830.40, 511,245.60 and 191,531.20 is: 287,296.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,830.40 : 511,245.60 = 191,531.20 : x
  2. Step 2: Convert to fraction form
    340,830.40/511,245.60 = 191,531.20/x
  3. Step 3: Cross multiply
    340,830.40x = 511,245.60 × 191,531.20
  4. Step 4: Simplify right side
    340,830.40x = 97,919,483,262.72
  5. Step 5: Solve for x
    x = 97,919,483,262.72/340,830.40
  6. Step 6: Final answer
    x = 287,296.80

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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.