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Finding the Fourth Proportional to 275,715.54, 380,488.95 and 154,856.82

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Solution

The fourth proportional to 275,715.54, 380,488.95 and 154,856.82 is: 213,703.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,715.54 : 380,488.95 = 154,856.82 : x
  2. Step 2: Convert to fraction form
    275,715.54/380,488.95 = 154,856.82/x
  3. Step 3: Cross multiply
    275,715.54x = 380,488.95 × 154,856.82
  4. Step 4: Simplify right side
    275,715.54x = 58,921,308,842.14
  5. Step 5: Solve for x
    x = 58,921,308,842.14/275,715.54
  6. Step 6: Final answer
    x = 213,703.26

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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.