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Finding the Third Proportional to 430.00 and 669.20

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Solution

The third proportional to 430.00 and 669.20 is: 1,041.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.00 : 669.20 = 669.20 : x
  2. Step 2: Convert to fraction form
    430.00/669.20 = 669.20/x
  3. Step 3: Cross multiply
    430.00x = 669.20 × 669.20
  4. Step 4: Simplify right side
    430.00x = 447,827.59
  5. Step 5: Solve for x
    x = 447,827.59/430.00
  6. Step 6: Final answer
    x = 1,041.47

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.