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Finding the Fourth Proportional to 666.36, 993.96 and 637.20

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Solution

The fourth proportional to 666.36, 993.96 and 637.20 is: 950.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.36 : 993.96 = 637.20 : x
  2. Step 2: Convert to fraction form
    666.36/993.96 = 637.20/x
  3. Step 3: Cross multiply
    666.36x = 993.96 × 637.20
  4. Step 4: Simplify right side
    666.36x = 633,351.31
  5. Step 5: Solve for x
    x = 633,351.31/666.36
  6. Step 6: Final answer
    x = 950.46

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.