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Finding the Fourth Proportional to 637,138.72, 956,299.36 and 321,817.12

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Solution

The fourth proportional to 637,138.72, 956,299.36 and 321,817.12 is: 483,024.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    637,138.72 : 956,299.36 = 321,817.12 : x
  2. Step 2: Convert to fraction form
    637,138.72/956,299.36 = 321,817.12/x
  3. Step 3: Cross multiply
    637,138.72x = 956,299.36 × 321,817.12
  4. Step 4: Simplify right side
    637,138.72x = 307,753,505,893.04
  5. Step 5: Solve for x
    x = 307,753,505,893.04/637,138.72
  6. Step 6: Final answer
    x = 483,024.33

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Double scale
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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.