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Finding the Third Proportional to 430.88 and 666.38

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Solution

The third proportional to 430.88 and 666.38 is: 1,030.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.88 : 666.38 = 666.38 : x
  2. Step 2: Convert to fraction form
    430.88/666.38 = 666.38/x
  3. Step 3: Cross multiply
    430.88x = 666.38 × 666.38
  4. Step 4: Simplify right side
    430.88x = 444,055.64
  5. Step 5: Solve for x
    x = 444,055.64/430.88
  6. Step 6: Final answer
    x = 1,030.59

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.