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Finding the Fourth Proportional to 3,423.69, 4,724.69 and 1,931.60

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Solution

The fourth proportional to 3,423.69, 4,724.69 and 1,931.60 is: 2,665.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,423.69 : 4,724.69 = 1,931.60 : x
  2. Step 2: Convert to fraction form
    3,423.69/4,724.69 = 1,931.60/x
  3. Step 3: Cross multiply
    3,423.69x = 4,724.69 × 1,931.60
  4. Step 4: Simplify right side
    3,423.69x = 9,126,213.36
  5. Step 5: Solve for x
    x = 9,126,213.36/3,423.69
  6. Step 6: Final answer
    x = 2,665.61

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1.5x scale

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.