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Finding the Fourth Proportional to 309,465.90, 427,083.36 and 173,508.72

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Solution

The fourth proportional to 309,465.90, 427,083.36 and 173,508.72 is: 239,453.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,465.90 : 427,083.36 = 173,508.72 : x
  2. Step 2: Convert to fraction form
    309,465.90/427,083.36 = 173,508.72/x
  3. Step 3: Cross multiply
    309,465.90x = 427,083.36 × 173,508.72
  4. Step 4: Simplify right side
    309,465.90x = 74,102,687,126.90
  5. Step 5: Solve for x
    x = 74,102,687,126.90/309,465.90
  6. Step 6: Final answer
    x = 239,453.48

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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.