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Finding the Fourth Proportional to 292,316.20, 438,231.30 and 123,965.80

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Solution

The fourth proportional to 292,316.20, 438,231.30 and 123,965.80 is: 185,845.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,316.20 : 438,231.30 = 123,965.80 : x
  2. Step 2: Convert to fraction form
    292,316.20/438,231.30 = 123,965.80/x
  3. Step 3: Cross multiply
    292,316.20x = 438,231.30 × 123,965.80
  4. Step 4: Simplify right side
    292,316.20x = 54,325,693,689.54
  5. Step 5: Solve for x
    x = 54,325,693,689.54/292,316.20
  6. Step 6: Final answer
    x = 185,845.65

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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.