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Finding the Fourth Proportional to 3,931.73, 5,428.02 and 2,607.22

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Solution

The fourth proportional to 3,931.73, 5,428.02 and 2,607.22 is: 3,599.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.73 : 5,428.02 = 2,607.22 : x
  2. Step 2: Convert to fraction form
    3,931.73/5,428.02 = 2,607.22/x
  3. Step 3: Cross multiply
    3,931.73x = 5,428.02 × 2,607.22
  4. Step 4: Simplify right side
    3,931.73x = 14,152,042.30
  5. Step 5: Solve for x
    x = 14,152,042.30/3,931.73
  6. Step 6: Final answer
    x = 3,599.44

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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.