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Finding the Fourth Proportional to 266,666.40, 399,999.60 and 166,939.20

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Solution

The fourth proportional to 266,666.40, 399,999.60 and 166,939.20 is: 250,408.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,666.40 : 399,999.60 = 166,939.20 : x
  2. Step 2: Convert to fraction form
    266,666.40/399,999.60 = 166,939.20/x
  3. Step 3: Cross multiply
    266,666.40x = 399,999.60 × 166,939.20
  4. Step 4: Simplify right side
    266,666.40x = 66,775,613,224.32
  5. Step 5: Solve for x
    x = 66,775,613,224.32/266,666.40
  6. Step 6: Final answer
    x = 250,408.80

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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.