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Finding the Fourth Proportional to 2,666.52, 3,999.58 and 817.64

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Solution

The fourth proportional to 2,666.52, 3,999.58 and 817.64 is: 1,226.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,666.52 : 3,999.58 = 817.64 : x
  2. Step 2: Convert to fraction form
    2,666.52/3,999.58 = 817.64/x
  3. Step 3: Cross multiply
    2,666.52x = 3,999.58 × 817.64
  4. Step 4: Simplify right side
    2,666.52x = 3,270,232.05
  5. Step 5: Solve for x
    x = 3,270,232.05/2,666.52
  6. Step 6: Final answer
    x = 1,226.40

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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.