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Finding the Fourth Proportional to 383,760.40, 575,122.20 and 257,040.40

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Solution

The fourth proportional to 383,760.40, 575,122.20 and 257,040.40 is: 385,213.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,760.40 : 575,122.20 = 257,040.40 : x
  2. Step 2: Convert to fraction form
    383,760.40/575,122.20 = 257,040.40/x
  3. Step 3: Cross multiply
    383,760.40x = 575,122.20 × 257,040.40
  4. Step 4: Simplify right side
    383,760.40x = 147,829,640,336.88
  5. Step 5: Solve for x
    x = 147,829,640,336.88/383,760.40
  6. Step 6: Final answer
    x = 385,213.38

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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.