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Finding the Fourth Proportional to 630,665.80, 945,998.70 and 331,030.60

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Solution

The fourth proportional to 630,665.80, 945,998.70 and 331,030.60 is: 496,545.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,665.80 : 945,998.70 = 331,030.60 : x
  2. Step 2: Convert to fraction form
    630,665.80/945,998.70 = 331,030.60/x
  3. Step 3: Cross multiply
    630,665.80x = 945,998.70 × 331,030.60
  4. Step 4: Simplify right side
    630,665.80x = 313,154,517,260.22
  5. Step 5: Solve for x
    x = 313,154,517,260.22/630,665.80
  6. Step 6: Final answer
    x = 496,545.90

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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.