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Finding the Fourth Proportional to 489,279.92, 675,195.64 and 274,415.28

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Solution

The fourth proportional to 489,279.92, 675,195.64 and 274,415.28 is: 378,687.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,279.92 : 675,195.64 = 274,415.28 : x
  2. Step 2: Convert to fraction form
    489,279.92/675,195.64 = 274,415.28/x
  3. Step 3: Cross multiply
    489,279.92x = 675,195.64 × 274,415.28
  4. Step 4: Simplify right side
    489,279.92x = 185,284,000,605.38
  5. Step 5: Solve for x
    x = 185,284,000,605.38/489,279.92
  6. Step 6: Final answer
    x = 378,687.11

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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.