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Finding the Fourth Proportional to 309,612.08, 427,269.48 and 173,676.20

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Solution

The fourth proportional to 309,612.08, 427,269.48 and 173,676.20 is: 239,675.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,612.08 : 427,269.48 = 173,676.20 : x
  2. Step 2: Convert to fraction form
    309,612.08/427,269.48 = 173,676.20/x
  3. Step 3: Cross multiply
    309,612.08x = 427,269.48 × 173,676.20
  4. Step 4: Simplify right side
    309,612.08x = 74,206,539,662.38
  5. Step 5: Solve for x
    x = 74,206,539,662.38/309,612.08
  6. Step 6: Final answer
    x = 239,675.85

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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.