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Finding the Fourth Proportional to 545,344.20, 818,016.30 and 485,209.80

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Solution

The fourth proportional to 545,344.20, 818,016.30 and 485,209.80 is: 727,814.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,344.20 : 818,016.30 = 485,209.80 : x
  2. Step 2: Convert to fraction form
    545,344.20/818,016.30 = 485,209.80/x
  3. Step 3: Cross multiply
    545,344.20x = 818,016.30 × 485,209.80
  4. Step 4: Simplify right side
    545,344.20x = 396,909,525,319.74
  5. Step 5: Solve for x
    x = 396,909,525,319.74/545,344.20
  6. Step 6: Final answer
    x = 727,814.70

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Similar ratio
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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.