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Finding the Fourth Proportional to 309,877.90, 427,674.40 and 173,919.94

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Solution

The fourth proportional to 309,877.90, 427,674.40 and 173,919.94 is: 240,033.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,877.90 : 427,674.40 = 173,919.94 : x
  2. Step 2: Convert to fraction form
    309,877.90/427,674.40 = 173,919.94/x
  3. Step 3: Cross multiply
    309,877.90x = 427,674.40 × 173,919.94
  4. Step 4: Simplify right side
    309,877.90x = 74,381,105,987.54
  5. Step 5: Solve for x
    x = 74,381,105,987.54/309,877.90
  6. Step 6: Final answer
    x = 240,033.59

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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.