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Finding the Fourth Proportional to 381,672.80, 572,509.20 and 374,674.40

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Solution

The fourth proportional to 381,672.80, 572,509.20 and 374,674.40 is: 562,011.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,672.80 : 572,509.20 = 374,674.40 : x
  2. Step 2: Convert to fraction form
    381,672.80/572,509.20 = 374,674.40/x
  3. Step 3: Cross multiply
    381,672.80x = 572,509.20 × 374,674.40
  4. Step 4: Simplify right side
    381,672.80x = 214,504,541,004.48
  5. Step 5: Solve for x
    x = 214,504,541,004.48/381,672.80
  6. Step 6: Final answer
    x = 562,011.60

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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.