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Finding the Fourth Proportional to 257,470.08, 355,242 and 155,414.88

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Solution

The fourth proportional to 257,470.08, 355,242 and 155,414.88 is: 214,432.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,470.08 : 355,242 = 155,414.88 : x
  2. Step 2: Convert to fraction form
    257,470.08/355,242 = 155,414.88/x
  3. Step 3: Cross multiply
    257,470.08x = 355,242 × 155,414.88
  4. Step 4: Simplify right side
    257,470.08x = 55,209,892,800.96
  5. Step 5: Solve for x
    x = 55,209,892,800.96/257,470.08
  6. Step 6: Final answer
    x = 214,432.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.