Home / 808,859.20-1,213,288.80-543,438.40

Finding the Fourth Proportional to 808,859.20, 1,213,288.80 and 543,438.40

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Solution

The fourth proportional to 808,859.20, 1,213,288.80 and 543,438.40 is: 815,157.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,859.20 : 1,213,288.80 = 543,438.40 : x
  2. Step 2: Convert to fraction form
    808,859.20/1,213,288.80 = 543,438.40/x
  3. Step 3: Cross multiply
    808,859.20x = 1,213,288.80 × 543,438.40
  4. Step 4: Simplify right side
    808,859.20x = 659,347,724,209.92
  5. Step 5: Solve for x
    x = 659,347,724,209.92/808,859.20
  6. Step 6: Final answer
    x = 815,157.60

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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.