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Finding the Fourth Proportional to 666.33, 999.89 and 255.50

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Solution

The fourth proportional to 666.33, 999.89 and 255.50 is: 383.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.33 : 999.89 = 255.50 : x
  2. Step 2: Convert to fraction form
    666.33/999.89 = 255.50/x
  3. Step 3: Cross multiply
    666.33x = 999.89 × 255.50
  4. Step 4: Simplify right side
    666.33x = 255,473.12
  5. Step 5: Solve for x
    x = 255,473.12/666.33
  6. Step 6: Final answer
    x = 383.40

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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.