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Finding the Third Proportional to 260,318.50 and 402,275.50

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Solution

The third proportional to 260,318.50 and 402,275.50 is: 621,644.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,318.50 : 402,275.50 = 402,275.50 : x
  2. Step 2: Convert to fraction form
    260,318.50/402,275.50 = 402,275.50/x
  3. Step 3: Cross multiply
    260,318.50x = 402,275.50 × 402,275.50
  4. Step 4: Simplify right side
    260,318.50x = 161,825,577,900.25
  5. Step 5: Solve for x
    x = 161,825,577,900.25/260,318.50
  6. Step 6: Final answer
    x = 621,644.55

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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.