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Finding the Fourth Proportional to 280,830.40, 421,245.60 and 245,838.40

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Solution

The fourth proportional to 280,830.40, 421,245.60 and 245,838.40 is: 368,757.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,830.40 : 421,245.60 = 245,838.40 : x
  2. Step 2: Convert to fraction form
    280,830.40/421,245.60 = 245,838.40/x
  3. Step 3: Cross multiply
    280,830.40x = 421,245.60 × 245,838.40
  4. Step 4: Simplify right side
    280,830.40x = 103,558,344,311.04
  5. Step 5: Solve for x
    x = 103,558,344,311.04/280,830.40
  6. Step 6: Final answer
    x = 368,757.60

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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.