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Finding the Fourth Proportional to 455,428.80, 683,143.20 and 189,052.20

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Solution

The fourth proportional to 455,428.80, 683,143.20 and 189,052.20 is: 283,578.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,428.80 : 683,143.20 = 189,052.20 : x
  2. Step 2: Convert to fraction form
    455,428.80/683,143.20 = 189,052.20/x
  3. Step 3: Cross multiply
    455,428.80x = 683,143.20 × 189,052.20
  4. Step 4: Simplify right side
    455,428.80x = 129,149,724,875.04
  5. Step 5: Solve for x
    x = 129,149,724,875.04/455,428.80
  6. Step 6: Final answer
    x = 283,578.30

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Similar ratio
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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.