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Finding the Fourth Proportional to 335,287.20, 502,930.80 and 85,969.20

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Solution

The fourth proportional to 335,287.20, 502,930.80 and 85,969.20 is: 128,953.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    335,287.20 : 502,930.80 = 85,969.20 : x
  2. Step 2: Convert to fraction form
    335,287.20/502,930.80 = 85,969.20/x
  3. Step 3: Cross multiply
    335,287.20x = 502,930.80 × 85,969.20
  4. Step 4: Simplify right side
    335,287.20x = 43,236,558,531.36
  5. Step 5: Solve for x
    x = 43,236,558,531.36/335,287.20
  6. Step 6: Final answer
    x = 128,953.80

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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.