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Finding the Fourth Proportional to 309,879.90, 427,677.16 and 173,921.94

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Solution

The fourth proportional to 309,879.90, 427,677.16 and 173,921.94 is: 240,036.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,879.90 : 427,677.16 = 173,921.94 : x
  2. Step 2: Convert to fraction form
    309,879.90/427,677.16 = 173,921.94/x
  3. Step 3: Cross multiply
    309,879.90x = 427,677.16 × 173,921.94
  4. Step 4: Simplify right side
    309,879.90x = 74,382,441,360.89
  5. Step 5: Solve for x
    x = 74,382,441,360.89/309,879.90
  6. Step 6: Final answer
    x = 240,036.35

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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.