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Finding the Fourth Proportional to 545,674.20, 818,511.30 and 521,179.80

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Solution

The fourth proportional to 545,674.20, 818,511.30 and 521,179.80 is: 781,769.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,674.20 : 818,511.30 = 521,179.80 : x
  2. Step 2: Convert to fraction form
    545,674.20/818,511.30 = 521,179.80/x
  3. Step 3: Cross multiply
    545,674.20x = 818,511.30 × 521,179.80
  4. Step 4: Simplify right side
    545,674.20x = 426,591,555,631.74
  5. Step 5: Solve for x
    x = 426,591,555,631.74/545,674.20
  6. Step 6: Final answer
    x = 781,769.70

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Double scale
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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.