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Finding the Fourth Proportional to 664,666.60, 996,999.90 and 664,666.60

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Solution

The fourth proportional to 664,666.60, 996,999.90 and 664,666.60 is: 996,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,666.60 : 996,999.90 = 664,666.60 : x
  2. Step 2: Convert to fraction form
    664,666.60/996,999.90 = 664,666.60/x
  3. Step 3: Cross multiply
    664,666.60x = 996,999.90 × 664,666.60
  4. Step 4: Simplify right side
    664,666.60x = 662,672,533,733.34
  5. Step 5: Solve for x
    x = 662,672,533,733.34/664,666.60
  6. Step 6: Final answer
    x = 996,999.90

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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.