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Finding the Fourth Proportional to 2,656.55, 3,980.06 and 2,215.10

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Solution

The fourth proportional to 2,656.55, 3,980.06 and 2,215.10 is: 3,318.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656.55 : 3,980.06 = 2,215.10 : x
  2. Step 2: Convert to fraction form
    2,656.55/3,980.06 = 2,215.10/x
  3. Step 3: Cross multiply
    2,656.55x = 3,980.06 × 2,215.10
  4. Step 4: Simplify right side
    2,656.55x = 8,816,230.91
  5. Step 5: Solve for x
    x = 8,816,230.91/2,656.55
  6. Step 6: Final answer
    x = 3,318.68

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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.