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Finding the Fourth Proportional to 521,653.45, 782,770.89 and 281,762.50

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Solution

The fourth proportional to 521,653.45, 782,770.89 and 281,762.50 is: 422,800.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,653.45 : 782,770.89 = 281,762.50 : x
  2. Step 2: Convert to fraction form
    521,653.45/782,770.89 = 281,762.50/x
  3. Step 3: Cross multiply
    521,653.45x = 782,770.89 × 281,762.50
  4. Step 4: Simplify right side
    521,653.45x = 220,555,478,979.77
  5. Step 5: Solve for x
    x = 220,555,478,979.77/521,653.45
  6. Step 6: Final answer
    x = 422,800.77

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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.