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Finding the Fourth Proportional to 355,406.78, 533,203.64 and 127,725.39

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Solution

The fourth proportional to 355,406.78, 533,203.64 and 127,725.39 is: 191,621.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,406.78 : 533,203.64 = 127,725.39 : x
  2. Step 2: Convert to fraction form
    355,406.78/533,203.64 = 127,725.39/x
  3. Step 3: Cross multiply
    355,406.78x = 533,203.64 × 127,725.39
  4. Step 4: Simplify right side
    355,406.78x = 68,103,642,229.79
  5. Step 5: Solve for x
    x = 68,103,642,229.79/355,406.78
  6. Step 6: Final answer
    x = 191,621.68

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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.