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Finding the Fourth Proportional to 543,382.80, 815,074.20 and 455,465.40

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Solution

The fourth proportional to 543,382.80, 815,074.20 and 455,465.40 is: 683,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,382.80 : 815,074.20 = 455,465.40 : x
  2. Step 2: Convert to fraction form
    543,382.80/815,074.20 = 455,465.40/x
  3. Step 3: Cross multiply
    543,382.80x = 815,074.20 × 455,465.40
  4. Step 4: Simplify right side
    543,382.80x = 371,238,096,532.68
  5. Step 5: Solve for x
    x = 371,238,096,532.68/543,382.80
  6. Step 6: Final answer
    x = 683,198.10

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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.