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Finding the Fourth Proportional to 280,853.10, 421,279.65 and 245,861.10

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Solution

The fourth proportional to 280,853.10, 421,279.65 and 245,861.10 is: 368,791.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,853.10 : 421,279.65 = 245,861.10 : x
  2. Step 2: Convert to fraction form
    280,853.10/421,279.65 = 245,861.10/x
  3. Step 3: Cross multiply
    280,853.10x = 421,279.65 × 245,861.10
  4. Step 4: Simplify right side
    280,853.10x = 103,576,278,156.62
  5. Step 5: Solve for x
    x = 103,576,278,156.62/280,853.10
  6. Step 6: Final answer
    x = 368,791.65

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1.5x scale

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.