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Finding the Fourth Proportional to 328,014.60, 492,021.90 and 91,393.80

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Solution

The fourth proportional to 328,014.60, 492,021.90 and 91,393.80 is: 137,090.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,014.60 : 492,021.90 = 91,393.80 : x
  2. Step 2: Convert to fraction form
    328,014.60/492,021.90 = 91,393.80/x
  3. Step 3: Cross multiply
    328,014.60x = 492,021.90 × 91,393.80
  4. Step 4: Simplify right side
    328,014.60x = 44,967,751,124.22
  5. Step 5: Solve for x
    x = 44,967,751,124.22/328,014.60
  6. Step 6: Final answer
    x = 137,090.70

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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.