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Finding the Fourth Proportional to 328,126.48, 492,191.74 and 91,471.21

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Solution

The fourth proportional to 328,126.48, 492,191.74 and 91,471.21 is: 137,207.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,126.48 : 492,191.74 = 91,471.21 : x
  2. Step 2: Convert to fraction form
    328,126.48/492,191.74 = 91,471.21/x
  3. Step 3: Cross multiply
    328,126.48x = 492,191.74 × 91,471.21
  4. Step 4: Simplify right side
    328,126.48x = 45,021,372,893.67
  5. Step 5: Solve for x
    x = 45,021,372,893.67/328,126.48
  6. Step 6: Final answer
    x = 137,207.38

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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.