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Finding the Fourth Proportional to 3,953.01, 5,455.08 and 2,820.76

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Solution

The fourth proportional to 3,953.01, 5,455.08 and 2,820.76 is: 3,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.01 : 5,455.08 = 2,820.76 : x
  2. Step 2: Convert to fraction form
    3,953.01/5,455.08 = 2,820.76/x
  3. Step 3: Cross multiply
    3,953.01x = 5,455.08 × 2,820.76
  4. Step 4: Simplify right side
    3,953.01x = 15,387,471.46
  5. Step 5: Solve for x
    x = 15,387,471.46/3,953.01
  6. Step 6: Final answer
    x = 3,892.60

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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.