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Finding the Fourth Proportional to 318,999.60, 478,499.40 and 161,207.55

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Solution

The fourth proportional to 318,999.60, 478,499.40 and 161,207.55 is: 241,811.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,999.60 : 478,499.40 = 161,207.55 : x
  2. Step 2: Convert to fraction form
    318,999.60/478,499.40 = 161,207.55/x
  3. Step 3: Cross multiply
    318,999.60x = 478,499.40 × 161,207.55
  4. Step 4: Simplify right side
    318,999.60x = 77,137,715,950.47
  5. Step 5: Solve for x
    x = 77,137,715,950.47/318,999.60
  6. Step 6: Final answer
    x = 241,811.33

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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.