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Finding the Fourth Proportional to 545,834.20, 818,751.30 and 280,113.70

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Solution

The fourth proportional to 545,834.20, 818,751.30 and 280,113.70 is: 420,170.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,834.20 : 818,751.30 = 280,113.70 : x
  2. Step 2: Convert to fraction form
    545,834.20/818,751.30 = 280,113.70/x
  3. Step 3: Cross multiply
    545,834.20x = 818,751.30 × 280,113.70
  4. Step 4: Simplify right side
    545,834.20x = 229,343,456,022.81
  5. Step 5: Solve for x
    x = 229,343,456,022.81/545,834.20
  6. Step 6: Final answer
    x = 420,170.55

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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.