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Finding the Fourth Proportional to 545,410.80, 818,116.20 and 455,209.20

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Solution

The fourth proportional to 545,410.80, 818,116.20 and 455,209.20 is: 682,813.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,410.80 : 818,116.20 = 455,209.20 : x
  2. Step 2: Convert to fraction form
    545,410.80/818,116.20 = 455,209.20/x
  3. Step 3: Cross multiply
    545,410.80x = 818,116.20 × 455,209.20
  4. Step 4: Simplify right side
    545,410.80x = 372,414,020,909.04
  5. Step 5: Solve for x
    x = 372,414,020,909.04/545,410.80
  6. Step 6: Final answer
    x = 682,813.80

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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.