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Finding the Fourth Proportional to 455,540.70, 683,311.05 and 431,046.30

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Solution

The fourth proportional to 455,540.70, 683,311.05 and 431,046.30 is: 646,569.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,540.70 : 683,311.05 = 431,046.30 : x
  2. Step 2: Convert to fraction form
    455,540.70/683,311.05 = 431,046.30/x
  3. Step 3: Cross multiply
    455,540.70x = 683,311.05 × 431,046.30
  4. Step 4: Simplify right side
    455,540.70x = 294,538,699,851.62
  5. Step 5: Solve for x
    x = 294,538,699,851.62/455,540.70
  6. Step 6: Final answer
    x = 646,569.45

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Double scale
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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.