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Finding the Fourth Proportional to 371,269.32, 555,961.92 and 311,139.68

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Solution

The fourth proportional to 371,269.32, 555,961.92 and 311,139.68 is: 465,920.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,269.32 : 555,961.92 = 311,139.68 : x
  2. Step 2: Convert to fraction form
    371,269.32/555,961.92 = 311,139.68/x
  3. Step 3: Cross multiply
    371,269.32x = 555,961.92 × 311,139.68
  4. Step 4: Simplify right side
    371,269.32x = 172,981,813,880.99
  5. Step 5: Solve for x
    x = 172,981,813,880.99/371,269.32
  6. Step 6: Final answer
    x = 465,920.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.