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Finding the Fourth Proportional to 641,010.60, 961,515.90 and 309,234.60

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Solution

The fourth proportional to 641,010.60, 961,515.90 and 309,234.60 is: 463,851.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,010.60 : 961,515.90 = 309,234.60 : x
  2. Step 2: Convert to fraction form
    641,010.60/961,515.90 = 309,234.60/x
  3. Step 3: Cross multiply
    641,010.60x = 961,515.90 × 309,234.60
  4. Step 4: Simplify right side
    641,010.60x = 297,333,984,730.14
  5. Step 5: Solve for x
    x = 297,333,984,730.14/641,010.60
  6. Step 6: Final answer
    x = 463,851.90

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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.