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Finding the Fourth Proportional to 328,049.60, 492,074.40 and 91,428.80

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Solution

The fourth proportional to 328,049.60, 492,074.40 and 91,428.80 is: 137,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,049.60 : 492,074.40 = 91,428.80 : x
  2. Step 2: Convert to fraction form
    328,049.60/492,074.40 = 91,428.80/x
  3. Step 3: Cross multiply
    328,049.60x = 492,074.40 × 91,428.80
  4. Step 4: Simplify right side
    328,049.60x = 44,989,771,902.72
  5. Step 5: Solve for x
    x = 44,989,771,902.72/328,049.60
  6. Step 6: Final answer
    x = 137,143.20

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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.