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Finding the Fourth Proportional to 455,958.60, 683,937.90 and 140,512.20

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Solution

The fourth proportional to 455,958.60, 683,937.90 and 140,512.20 is: 210,768.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,958.60 : 683,937.90 = 140,512.20 : x
  2. Step 2: Convert to fraction form
    455,958.60/683,937.90 = 140,512.20/x
  3. Step 3: Cross multiply
    455,958.60x = 683,937.90 × 140,512.20
  4. Step 4: Simplify right side
    455,958.60x = 96,101,618,992.38
  5. Step 5: Solve for x
    x = 96,101,618,992.38/455,958.60
  6. Step 6: Final answer
    x = 210,768.30

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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.