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Finding the Fourth Proportional to 415,996.45, 623,996.50 and 131,688.39

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Solution

The fourth proportional to 415,996.45, 623,996.50 and 131,688.39 is: 197,533.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,996.45 : 623,996.50 = 131,688.39 : x
  2. Step 2: Convert to fraction form
    415,996.45/623,996.50 = 131,688.39/x
  3. Step 3: Cross multiply
    415,996.45x = 623,996.50 × 131,688.39
  4. Step 4: Simplify right side
    415,996.45x = 82,173,096,893.50
  5. Step 5: Solve for x
    x = 82,173,096,893.50/415,996.45
  6. Step 6: Final answer
    x = 197,533.17

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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.