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Finding the Fourth Proportional to 278,805.66, 384,755.31 and 151,483.38

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Solution

The fourth proportional to 278,805.66, 384,755.31 and 151,483.38 is: 209,048.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,805.66 : 384,755.31 = 151,483.38 : x
  2. Step 2: Convert to fraction form
    278,805.66/384,755.31 = 151,483.38/x
  3. Step 3: Cross multiply
    278,805.66x = 384,755.31 × 151,483.38
  4. Step 4: Simplify right side
    278,805.66x = 58,284,034,831.75
  5. Step 5: Solve for x
    x = 58,284,034,831.75/278,805.66
  6. Step 6: Final answer
    x = 209,048.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.