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Finding the Fourth Proportional to 3,639.40, 5,459.10 and 2,655.40

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Solution

The fourth proportional to 3,639.40, 5,459.10 and 2,655.40 is: 3,983.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,639.40 : 5,459.10 = 2,655.40 : x
  2. Step 2: Convert to fraction form
    3,639.40/5,459.10 = 2,655.40/x
  3. Step 3: Cross multiply
    3,639.40x = 5,459.10 × 2,655.40
  4. Step 4: Simplify right side
    3,639.40x = 14,496,094.14
  5. Step 5: Solve for x
    x = 14,496,094.14/3,639.40
  6. Step 6: Final answer
    x = 3,983.10

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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.