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Finding the Third Proportional to 430.95 and 644.76

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Solution

The third proportional to 430.95 and 644.76 is: 964.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    430.95 : 644.76 = 644.76 : x
  2. Step 2: Convert to fraction form
    430.95/644.76 = 644.76/x
  3. Step 3: Cross multiply
    430.95x = 644.76 × 644.76
  4. Step 4: Simplify right side
    430.95x = 415,711.38
  5. Step 5: Solve for x
    x = 415,711.38/430.95
  6. Step 6: Final answer
    x = 964.65

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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.