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Finding the Fourth Proportional to 809,574.80, 1,211,251.80 and 529,638.80

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Solution

The fourth proportional to 809,574.80, 1,211,251.80 and 529,638.80 is: 792,423.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,574.80 : 1,211,251.80 = 529,638.80 : x
  2. Step 2: Convert to fraction form
    809,574.80/1,211,251.80 = 529,638.80/x
  3. Step 3: Cross multiply
    809,574.80x = 1,211,251.80 × 529,638.80
  4. Step 4: Simplify right side
    809,574.80x = 641,525,949,849.84
  5. Step 5: Solve for x
    x = 641,525,949,849.84/809,574.80
  6. Step 6: Final answer
    x = 792,423.32

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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.