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Finding the Fourth Proportional to 309,879.72, 427,592.88 and 173,908.44

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Solution

The fourth proportional to 309,879.72, 427,592.88 and 173,908.44 is: 239,970.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,879.72 : 427,592.88 = 173,908.44 : x
  2. Step 2: Convert to fraction form
    309,879.72/427,592.88 = 173,908.44/x
  3. Step 3: Cross multiply
    309,879.72x = 427,592.88 × 173,908.44
  4. Step 4: Simplify right side
    309,879.72x = 74,362,010,715.91
  5. Step 5: Solve for x
    x = 74,362,010,715.91/309,879.72
  6. Step 6: Final answer
    x = 239,970.56

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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.