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Finding the Fourth Proportional to 3,397.72, 4,688.88 and 1,905.64

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Solution

The fourth proportional to 3,397.72, 4,688.88 and 1,905.64 is: 2,629.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,397.72 : 4,688.88 = 1,905.64 : x
  2. Step 2: Convert to fraction form
    3,397.72/4,688.88 = 1,905.64/x
  3. Step 3: Cross multiply
    3,397.72x = 4,688.88 × 1,905.64
  4. Step 4: Simplify right side
    3,397.72x = 8,935,317.28
  5. Step 5: Solve for x
    x = 8,935,317.28/3,397.72
  6. Step 6: Final answer
    x = 2,629.80

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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.