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Finding the Fourth Proportional to 666.18, 999.27 and 255.51

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Solution

The fourth proportional to 666.18, 999.27 and 255.51 is: 383.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.18 : 999.27 = 255.51 : x
  2. Step 2: Convert to fraction form
    666.18/999.27 = 255.51/x
  3. Step 3: Cross multiply
    666.18x = 999.27 × 255.51
  4. Step 4: Simplify right side
    666.18x = 255,323.48
  5. Step 5: Solve for x
    x = 255,323.48/666.18
  6. Step 6: Final answer
    x = 383.27

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Half scale
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Double scale
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Similar ratio
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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.