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Finding the Fourth Proportional to 280,830.60, 421,245.90 and 245,838.60

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Solution

The fourth proportional to 280,830.60, 421,245.90 and 245,838.60 is: 368,757.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,830.60 : 421,245.90 = 245,838.60 : x
  2. Step 2: Convert to fraction form
    280,830.60/421,245.90 = 245,838.60/x
  3. Step 3: Cross multiply
    280,830.60x = 421,245.90 × 245,838.60
  4. Step 4: Simplify right side
    280,830.60x = 103,558,502,311.74
  5. Step 5: Solve for x
    x = 103,558,502,311.74/280,830.60
  6. Step 6: Final answer
    x = 368,757.90

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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.