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Finding the Fourth Proportional to 280,837.80, 421,256.70 and 263,341.80

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Solution

The fourth proportional to 280,837.80, 421,256.70 and 263,341.80 is: 395,012.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,837.80 : 421,256.70 = 263,341.80 : x
  2. Step 2: Convert to fraction form
    280,837.80/421,256.70 = 263,341.80/x
  3. Step 3: Cross multiply
    280,837.80x = 421,256.70 × 263,341.80
  4. Step 4: Simplify right side
    280,837.80x = 110,934,497,640.06
  5. Step 5: Solve for x
    x = 110,934,497,640.06/280,837.80
  6. Step 6: Final answer
    x = 395,012.70

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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.