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Finding the Fourth Proportional to 381,812.40, 572,718.60 and 319,604.40

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Solution

The fourth proportional to 381,812.40, 572,718.60 and 319,604.40 is: 479,406.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,812.40 : 572,718.60 = 319,604.40 : x
  2. Step 2: Convert to fraction form
    381,812.40/572,718.60 = 319,604.40/x
  3. Step 3: Cross multiply
    381,812.40x = 572,718.60 × 319,604.40
  4. Step 4: Simplify right side
    381,812.40x = 183,043,384,521.84
  5. Step 5: Solve for x
    x = 183,043,384,521.84/381,812.40
  6. Step 6: Final answer
    x = 479,406.60

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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.