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Finding the Fourth Proportional to 309,878.90, 427,675.78 and 173,920.94

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Solution

The fourth proportional to 309,878.90, 427,675.78 and 173,920.94 is: 240,034.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,878.90 : 427,675.78 = 173,920.94 : x
  2. Step 2: Convert to fraction form
    309,878.90/427,675.78 = 173,920.94/x
  3. Step 3: Cross multiply
    309,878.90x = 427,675.78 × 173,920.94
  4. Step 4: Simplify right side
    309,878.90x = 74,381,773,672.83
  5. Step 5: Solve for x
    x = 74,381,773,672.83/309,878.90
  6. Step 6: Final answer
    x = 240,034.97

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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.