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Finding the Fourth Proportional to 381,344.40, 572,016.60 and 319,136.40

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Solution

The fourth proportional to 381,344.40, 572,016.60 and 319,136.40 is: 478,704.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,344.40 : 572,016.60 = 319,136.40 : x
  2. Step 2: Convert to fraction form
    381,344.40/572,016.60 = 319,136.40/x
  3. Step 3: Cross multiply
    381,344.40x = 572,016.60 × 319,136.40
  4. Step 4: Simplify right side
    381,344.40x = 182,551,318,464.24
  5. Step 5: Solve for x
    x = 182,551,318,464.24/381,344.40
  6. Step 6: Final answer
    x = 478,704.60

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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.