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Finding the Fourth Proportional to 280,876.05, 421,314.08 and 190,674.45

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Solution

The fourth proportional to 280,876.05, 421,314.08 and 190,674.45 is: 286,011.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,876.05 : 421,314.08 = 190,674.45 : x
  2. Step 2: Convert to fraction form
    280,876.05/421,314.08 = 190,674.45/x
  3. Step 3: Cross multiply
    280,876.05x = 421,314.08 × 190,674.45
  4. Step 4: Simplify right side
    280,876.05x = 80,333,829,527.88
  5. Step 5: Solve for x
    x = 80,333,829,527.88/280,876.05
  6. Step 6: Final answer
    x = 286,011.68

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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.