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Finding the Fourth Proportional to 3,423.78, 5,134.91 and 957.93

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Solution

The fourth proportional to 3,423.78, 5,134.91 and 957.93 is: 1,436.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.78 : 5,134.91 = 957.93 : x
  2. Step 2: Convert to fraction form
    3,423.78/5,134.91 = 957.93/x
  3. Step 3: Cross multiply
    3,423.78x = 5,134.91 × 957.93
  4. Step 4: Simplify right side
    3,423.78x = 4,918,879.55
  5. Step 5: Solve for x
    x = 4,918,879.55/3,423.78
  6. Step 6: Final answer
    x = 1,436.68

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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.