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Finding the Fourth Proportional to 280,999.20, 421,498.80 and 262,336.80

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Solution

The fourth proportional to 280,999.20, 421,498.80 and 262,336.80 is: 393,505.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,999.20 : 421,498.80 = 262,336.80 : x
  2. Step 2: Convert to fraction form
    280,999.20/421,498.80 = 262,336.80/x
  3. Step 3: Cross multiply
    280,999.20x = 421,498.80 × 262,336.80
  4. Step 4: Simplify right side
    280,999.20x = 110,574,646,395.84
  5. Step 5: Solve for x
    x = 110,574,646,395.84/280,999.20
  6. Step 6: Final answer
    x = 393,505.20

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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.