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Finding the Fourth Proportional to 275,289, 379,916.27 and 154,438.11

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Solution

The fourth proportional to 275,289, 379,916.27 and 154,438.11 is: 213,134.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,289 : 379,916.27 = 154,438.11 : x
  2. Step 2: Convert to fraction form
    275,289/379,916.27 = 154,438.11/x
  3. Step 3: Cross multiply
    275,289x = 379,916.27 × 154,438.11
  4. Step 4: Simplify right side
    275,289x = 58,673,549,924.86
  5. Step 5: Solve for x
    x = 58,673,549,924.86/275,289
  6. Step 6: Final answer
    x = 213,134.38

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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.